Category: Points of Information

Very brief descriptions, with appropriate links, of current or recent news items.

SpaceX’s eighth orbital test flight of Starship/Superheavy ends like the seventh flight

4:54 pm

Starship just before loss of signal
Starship just before loss of signal

Today’s eighth orbital test flight of SpaceX’s Starship/Superheavy giant rocket has turned out to be almost identical to the seventh flight, with Superheavy completing its mission with a perfect chopstick catch at the launch tower in Boca Chica and Starship failing just before engine shutdown that would have put it into its orbit.

The screen capture to the right shows that moment. Note that graphic on the far lower right. It indicates that only two of the outside engines are firing, in an asymmetrical configuration. As a result Starship began tumbling, as shown by the fact that the Earth is not visible in the background. Shortly thereafter contact was lost, and I expect the flight termination system took over to destroy the ship. Expect videos from the Caribbean of it burning up overhead in the next day or so.

Superheavy however completed the third ever capture by the launch tower chopsticks. Musk has indicated that the company is pushing to reuse a Superheavy booster as soon as possible. The lose of Starship and the fact that two Superheavy engines shut down prematurely during the boost-back burn after stage separation likely delays that reuse at least one or two test flights. First, this Superheavy had issues, that might be solvable but they nonetheless exist.

More important, the loss of Starship just before its orbital coast once again means SpaceX was unable to do any of its orbital and return test program. It will not make sense to risk the next Starship flight with a used Superheavy when testing Starship has now been delayed twice.

Nor does it matter much. It will take many more launches before this rocket is reliably reusable. The first priority now is to make it more reliable on its first launches. Expect SpaceX to target the next test flight for sometime in mid- to-late April.

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March 6, 2025 Quick space links

3:31 pm

Courtesy of BtB’s stringer Jay. This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.

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Athena sits at an unknown angle on the Moon, hampering operations

2:25 pm

Athena's landing site 100 miles from the Moon's south pole
Yellow cross indicates Athena’s targeted landing site

According to the CEO of Intuitive Machines, Athena is sitting an an unknown angle on the Moon, impacting the possibility of all surface science operations.

The tilt is hampering their ability to use the high gain antenna which they need use to download most of their data. They do not know the angle, or the cause of this issue. It could simply be that the ground slope is too severe. It is also possible the spacecraft, which has a relatively high center of gravity, fell over on its side because of that slope. Moreover, they do not know at the moment exactly where the spacecraft landed, though they know it landed on Mons Mouton as planned. They need to download pictures from the spacecraft, as well as from Lunar Reconnaissance Orbiter (LRO) in orbit to determine precisely the location and the situation.

It is also unclear what payloads will be impacted by this situation. It could be that most if all could be utilized, but that question cannot be answered until they learn more. I suspect both the mini-rover and the Grace hopper will be affected the most, as the tilt might make it impossible to deploy either.

For Intuitive Machines this situation is very unfortunate. It has sent two unmanned lunar landers, and both have had issues at landing, though it must be emphasized that the issue on today’s second landing might have nothing to do with the company’s engineering at all.

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Is a supermassive black hole is hidden in the Large Magellanic Cloud?

11:45 am

Based on the motions of a number of runaway stars on the edge of the Milky Way that are moving so fast they will leave the galaxy, astronomers believe that many were accelerated not by the galaxy’s own central supermassive black hole but a previously undetected supermassive black hole at the center of the Large Magellanic Cloud, one of the Milky Ways nearby dwarf galaxies.

To make this discovery, researchers traced the paths with ultra-fine precision of 21 stars on the outskirts of the Milky Way. These stars are traveling so fast that they will escape the gravitational clutches of the Milky Way or any nearby galaxy. Astronomers refer to these as “hypervelocity” stars.

Similar to how forensic experts recreate the origin of a bullet based on its trajectory, researchers determined where these hypervelocity stars come from. They found that about half are linked to the supermassive black hole at the center of the Milky Way. However, the other half originated from somewhere else: a previously-unknown giant black hole in the Large Magellanic Cloud (LMC).

You can read the paper here [pdf]. This result was made possible by the very precise location and velocity data of over a billion stars measured by Europe’s Gaia satellite.

Based on the available data, the scientists estimate (with great uncertainty) the mass of this supermassive black hole, which the scientists have dubbed LMC* (pronounced “LMC star”), to be about 600,000 times the mass of the Sun, quite big but significantly less than the mass of the Milky Way’s central black hole, Sagittarius A* (pronounced “A-star”), which is estimated to be about 4.3 million times the mass of the Sun.

The mystery to solve now is why this super massive black hole is so quiet. It has literally emitted no obvious energy in any wavelength in the past seven decades, since ground- and space-based telescopes went into operation capable of detecting such emissions. Even the relatively inactive supermassive black hole at the Milky Way’s center, Sagittarius A* (pronounced “A-star”) emits distinct radio energy that the first radio telescopes were able to detect almost immediately.

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Intuitive Machines’ Athena lander touches down softly; engineers are assessing spacecraft condition

10:55 am

Though Intuitive Machines’ Athena lander has apparently softly landed near the south pole of the Moon, there remains uncertainty about the spacecraft’s status. Engineers have contact with Athena, and are apparently shutting down the landing equipment in order to make Athena safe for surface operations.

Unlike the previous landing, the spacecraft is upright and responding fully as expected. It appears the main issue is the position of Athena relative to the horizon. This is important as it determines the best antenna’s to use to upload and download data to and from Earth.

A full update will be provided at a press conference scheduled for 4 pm (Eastern) today. I have embedded the live stream of that conference below.
» Read more

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Scientists discover the oldest known crater on Earth

10:09 am

Though erosion has made it visibly unnoticeable now, scientists have discovered geological features 3.5 billion years old in northwestern Australia that suggest the location is the oldest impact crater known on Earth.

The crater was discovered by geologists at Curtin University and the Geological Survey of Western Australia in the Pilbara region of northwestern Australia. While it’s hard to see directly as a classic crater shape, due to its age, the team found it through other evidence – namely “shatter cones,” geological features that form only when exposed to extreme pressures, like meteorite impacts or underground nuclear explosions.

The newly discovered crater is estimated to be at least 100 km (62 miles) wide, which suggests the original object that crashed into Earth was traveling at more than 36,000 km/h (22,000 mph), and would have caused destruction on a global scale. The impact appears to have occurred 3.47 billion years ago. “Before our discovery, the oldest impact crater was 2.2 billion years old, so this is by far the oldest known crater ever found on Earth,” said Professor Tim Johnson, co-lead author of the study.

You can read the published paper here. There are many assumptions and uncertainty in this conclusion, but it is likely correct.

The impact likely occurred during a time period scientists call the Late Heavy Bombardment, when the planets in the solar system were beginning to accrete out of the thick disk of dust and rocks that surrounded the Sun. On Earth most of the evidence of this bombardment is gone, destroyed by erosion and plate technoics. We only know about it from the craters on the Moon, Mercury, and Mars, where erosion has left those impacts mostly untouched.

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Ariane-6 successfully launches for the second time

9:47 am

The European Space Agency’s (ESA) commercial arm, Arianespace, today successfully launched from French Guiana its new Ariane-6 rocket for the second time, this time placing its first commercial payload, a military Earth imaging satellite, into orbit.

As of posting the satellite has not yet been deployed by the upper stage, as several additional engine burns are required over then hour or so to place it in the right orbit. As there were some issues with this upper stage on the rocket’s first launch, the successful completion of these burns is critical for the rocket’s future. So far the first major burn has been completed as planned. UPDATE: The payload has been successfully deployed in the proper orbit.

This was Europe’s first launch in 2025, so there is no change in leader board for the 2025 launch race:

26 SpaceX
9 China
3 Russia
2 Rocket Lab

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India’s space agency ISRO begins construction of second spaceport

9:38 am

India's spaceports
India’s spaceports

After several years getting the real estate as well as the necessary regulatory approvals, India’s space agency, Indian Space Research Organization (ISRO), has now begun construction of it second spaceport, dubbed Kulasekaranpattinam, near the southern tip of India.

The map to the right shows the location. The Sriharikota spaceport has been used by the agency for decades. The Agnikul site was used once by one of India’s rocket startups for a suborbital launch, but it is unclear if it will be upgraded to a full launch site in the future.

Kulasekarapattinam was one of the areas recommended for the launchpad even before the rocket launchpad was set up in Sriharikota due to its strategic geographical location near the equator. It is located on the east coast and there is no land to the south of it, allowing for direct southward launches over the Indian Ocean. This will minimize fuel consumption and maximize payload capacity for small satellite launch vehicles (SSLVs), particularly beneficial for cost-effective commercial satellite launches.

The site also avoids the need for complex “dogleg” manoeuvres around Sri Lanka. The manoeuvre involves a sharp turn or bend in a launch trajectory to avoid collisions or falling debris into populated areas, which would require additional fuel.

As part of the breaking ground ceremonies, ISRO scientists also completed a small suborbital rocket launch from this new site, reaching an altitude of 46 miles before falling back into the Indian Ocean.

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Future now very dim for Lunar Trailblazer

9:26 am

Though engineers are continuing attempts to re-establish contact with the orbiter Lunar Trailblazer as it flies outward after launch, the situation is becoming increasingly grim.

Based on telemetry before the loss of signal last week and ground-based radar data collected March 2, the team believes the spacecraft is spinning slowly in a low-power state. They will continue to monitor for signals should the spacecraft orientation change to where the solar panels receive more sunlight, increasing their output to support higher-power operations and communication.

The problem is that, without communications, the spacecraft was not able to do several mid-course corrections that would have sent it on the right path to the Moon. Though it might still be possible to get it to the Moon, communications must be re-established soon to do so.

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Europa Clipper completes Mars fly-by

9:21 am

Data from Europa Clipper has now confirmed that its March 1, 2025 Mars fly-by was successful, putting it on the right trajectory to do a fly-by of Earth in December 2026.

When Europa Clipper launched, navigators deliberately aimed a little away from Mars to avoid any possibility of a launch error turning into a Mars impact. Since then, they’ve performed three deep-space trajectory correction maneuvers to line up for the encounter. Europa Clipper whizzed by Mars at 17:57 UT, only 2 km away from the target height of 884 km. A final maneuver, planned for March 17th, will correct any residual trajectory error.

Only two instruments were activated, mostly as tests to see if they were operating properly. Though the data has not yet been downloaded back to Earth, engineers say that it appears all worked as expected.

If the Earth fly-by in 2026 is successful, Europa Clipper will rendezvous with Jupiter in April 2030, entering an orbit that will fly past Europa numerous times.

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Blue Ghost lunar surface operations proceeding as planned

9:13 am

According to a Firefly update today, all of Blue Ghost’s planned lunar surface operations are working as planned.

Eight out of 10 NASA payloads, including LPV, EDS, NGLR, RAC, RadPC, LuGRE, LISTER, and SCALPSS, have already met their mission objectives with more to come. Lunar PlanetVac for example successfully collected, transferred, and sorted lunar soil from the Moon using pressurized nitrogen gas.

I have embedded below the video posted at the link of Lunar PlanetVac deploying and then blowing that gas to capture surface soil.
» Read more

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Engineers turn off one more instrument on each Voyager spacecraft

3:57 pm

The Voyager missions
The routes the Voyager spacecraft have
taken since launch. Not to scale.

Due to continuing reductions in the power generated by their nuclear energy sources (after a half century of operation) engineers have now turned off one more science instrument on each Voyager spacecraft in order to extend the spacecrafts’ life as long as possible.

Mission engineers at NASA’s Jet Propulsion Laboratory in Southern California turned off the cosmic ray subsystem experiment aboard Voyager 1 on Feb. 25 and will shut off Voyager 2’s low-energy charged particle instrument on March 24. Three science instruments will continue to operate on each spacecraft. The moves are part of an ongoing effort to manage the gradually diminishing power supply of the twin probes.

Even with this action, the future lifespan of both spacecraft is very limited. It is expected the savings in power will allow both to last about a year longer, well into 2026. In order to keep the Voyagers operating as long as into the 2030s mission engineers are now working up a timeline for shutting down the remaining instruments in a step-by-step manner. In that long run the goal won’t be science gathering but engineering. Can humans keep a spacecraft operating for more than a half century at distances billions of miles away?

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Lunar Reconnaissance Orbiter snaps picture of Blue Ghost on the Moon

11:21 am

Blue Ghost on the Moon
Click for full image. For original of inset go here.

Shortly after Firefly’s Blue Ghost lunar lander touched down within Mare Crisium on the Moon, the science team for Lunar Reconnaissance Orbiter (LRO) used it to capture a picture of lander on the surface of the Moon.

That image is to the right, reduced to post here. The inset was expanded and sharpened to bring out the details, with the arrow showing Blue Ghost, that tiny dot in the center with a shadow to the right.

The Firefly Blue Ghost lunar lander set down on 2nd March 2025. The landing site (arrow) is about 4000 meters from the center of Mons Latreille, a large volcanic cone [seen to the left].

…LRO was 175 kilometers east (19.294°N, 67.956°E) of the landing site when the NACs acquired this dramatic view of the landing site on 02 March 2025 at 17:49 UTC.

Blue Ghost landed shortly after lunar sunrise, and is designed to operate for one full lunar day (fourteen Earth days). Whether it can survive the 14-day-long lunar night won’t be known until the next sunrise.

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Psyche captures Jupiter and Mars on its way to asteroid Psyche

11:02 am

Jupiter and Mars as seen by Psyche
Click for original image.

As part of routine maintenance and calibration, engineers on January 30, 2025 used the cameras on the Psyche asteroid probe to photograph Jupiter, Mars, and several stars, proving all is well with the spacecraft.

Scientists on the imaging team, led by Arizona State University, also took images of the bright stars Vega and Canopus, which have served as standard calibration sources for astronomers for decades. The team is also using the data to assess the effects of minor wiggles or “jitter” in the spacecraft’s pointing system as it points the cameras to different places in the sky. The observations of Jupiter and Mars also help the team determine how the cameras respond to solar system objects that shine by reflected sunlight, just like the Psyche asteroid.

The starfield pictures shown here are long-exposure (five-second) images captured by each camera. By over-exposing Jupiter to bring out some of the background stars in the Taurus constellation, the imagers were able to capture Jupiter’s fainter Galilean moons as well.

The picture to the right, cropped and reduced to post here, might not be much to look at, but it clearly demonstrates the cameras work and the spacecraft can point accurately, and will work as planned when it arrives at the metal asteroid Psyche in August 2029.

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Watch the eighth orbital test launch of SpaceX’s Starship/Superheavy

9:31 am

SpaceX is now targeting a 60-minute launch window on March 6, 2025 beginning at 5:30 pm (Central) for its eighth orbital test launch of its gigantic Starship/Superheavy rocket.

I have embedded the Space Affairs live stream below, as SpaceX’s X feed does not become active until it starts broadcasting about 40 minutes before the opening of that window.

As noted prior to the first launch attempt on March 3, 2025:

This flight has the same essential flight plan as the seventh flight, mainly because the prototype Starship on that previous flight was lost before it could achieve any of its goals. After Superheavy separates and attempts a chopstick landing at Boca Chica, Starship will go into a low orbit that will bring it down over the Indian Ocean. During the coast phase it will attempt to deploy four dummy Starlink satellites to test its deployment equipment, as well as do a Raptor-2 engine restart to demonstrate this works in order to prepare for a full orbit flight on a future test flight, possibly as soon as the next test flight.

Starship will also be testing a new configuration of thermal protection during its return, including leaving some places on its hull with no protection to see how those locations fare.

That first attempt was scrubbed at T-40 seconds because of issues on both Superheavy and Starship. Though it appears the team might have gotten those issues solved and launched, the decision was made to stand down and get them fixed properly, rather than rush things and possibly cause the mission to fail.
» Read more

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Watch the landing of Intuitive Machines’ Athena lander on the Moon tomorrow

9:21 am

Athena's landing site 100 miles from the Moon's south pole

NASA has now announced its live stream arrangement for the landing of Intuitive Machines’ Athena lander on the Moon tomorrow at 12:32 pm (Eastern).

The live stream will begin about sixty minutes before landing. The NASA live stream is available here. I have also embedded it below.

The map to the right shows the landing site by the yellow “X”, about 100 miles from the Moon’s south pole on a high relatively flat plateau dubbed Mons Mouton. This will be the closest any lander has come to the pole, and was the original site chosen for NASA’s now-canceled VIPER rover. If the landing is successful Athena will land close to a small crater that is believed to have permanently shadowed areas. The plan had been to have VIPER travel into it. Now the small Grace hopper that Athena carries will attempt this instead.

This will also be the second attempt by Intuitive Machines to soft land on the Moon. Its first attempt last year was able to land and communicate back to Earth, but the landing was not completely successful. The lander, named Nova-C as well as Odysseus, was moving too fast sideways when it touched down, thus breaking one leg so that the lander fell on its side.
» Read more

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France opens public comment period for adapting old French Guiana launchpad for commercial rockets

9:04 am

CNES, France’s space agency that now runs the French Guiana spaceport, is now running public meetings for the public to comment on its plans for adapting the old, long-abandoned Diamant rocket pad there for use by a number of commercial rocket startups.

On 17 February, the first of four public consultation sessions into the construction of the new Multi-Launcher Launch Complex (ELM1) at the Guiana Space Centre was held at Kourou Town Hall. This process allows local residents, stakeholders, and organizations to review the project and provide feedback before construction begins. A second session was completed on 23 February, with the remaining two sessions set for 10 and 18 March.

The construction of ELM1 will include common structures like the nodal building, guard post, offices, and storage areas, as well as more specific structures like assembly and preparation buildings, roads, and fences. The project is subject to a building permit, a unique environmental authorization under the regulations for Classified Installations for Environmental Protection, the Water Law, and a request for exemption from the prohibition on the destruction of protected species.

CNES in 2024 approved seven rocket startups to use the site. It later announced its plan to standardize the launchpad so that all users will have to arrive with identical engineering, something that these startups did not like. This comment period will allow them to voice those objections, and likely get the standardization minimized to only those places where it really matters. For example, the impression initially given was that the assembly and preparation buildings would require matching systems from all companies, something that makes no sense.

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Blue Ghost: Earth’s GPS constellations work on the Moon

8:50 am

Using an engineering test GPS-type receiver built by the Italian Space Agency, engineers have successfully been able to use the GPS-type satellites from two different constellations to pinpoint the location of Firefly’s Blue Ghost lander on the Moon.

The road to the historic milestone began on March 2 when the Firefly Aerospace’s Blue Ghost lunar lander touched down on the Moon and delivered LuGRE, one of 10 NASA payloads intended to advance lunar science. Soon after landing, LuGRE payload operators at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, began conducting their first science operation on the lunar surface.

With the receiver data flowing in, anticipation mounted. Could a Moon-based mission acquire and track signals from two GNSS constellations, GPS and Galileo, and use those signals for navigation on the lunar surface?

Then, at 2 a.m. EST on March 3, it was official: LuGRE acquired and tracked signals on the lunar surface for the first time ever and achieved a navigation fix — approximately 225,000 miles away from Earth.

Obviously, this is a first-time engineering test. A portable version of LuGRE will now have to be developed. However, this success means that any operation on the near side of the Moon will not need the addition of a new GPS-type constellation in lunar orbit. It also will likely simplify the design of any constellation for providing this capability to the far side.

Meanwhile, Blue Ghost continues to operate as planned on the surface, with all instruments functioning and several already collecting data.

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March 4, 2025 Quick space links

4:41 pm

Courtesy of BtB’s stringer Jay. This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.

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Scientists: X-rays from the Helix Nebula caused by the destruction of a planet

10:12 am

A composite image of the Helix Nebula
A composite image of the Helix Nebula, combining data
from multiple ground- and space-based telescopes.
Click for original image.

Using data collected by multiple ground-bases and space telescopes over decades, scientists now think the previously unexplained high energy X-rays coming from the white dwarf star at the center of the Helix Nebula are caused by the destruction of a Jupiter-sized exoplanet.

The besieged planet could have initially been a considerable distance from the white dwarf but then migrated inwards by interacting with the gravity of other planets in the system. Once it approached close enough to the white dwarf, the gravity of the star would have partially or completely torn the planet apart. “The mysterious signal we’ve been seeing could be caused by the debris from the shattered planet falling onto the white dwarf’s surface, and being heated to glow in X-rays,” said co-author Martin Guerrero of The Institute of Astrophysics of Andalusia in Spain. “If confirmed, this would be the first case of a planet seen to be destroyed by the central star in a planetary nebula.”

The study shows that the X-ray signal from the white dwarf has remained approximately constant in brightness between 1992, 1999, and 2002 (with observations by ROSAT, Chandra and XMM respectively). The data, however, suggests there may be a subtle, regular change in the X-ray signal every 2.9 hours, providing evidence for the remains of a planet exceptionally close to the white dwarf.

You can read the original paper here. The Helix Nebula is about 650 light years away, and is one of the most studied planetary nebula, believed to have formed when the central star collapsed into a white dwarf.

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SpaceX reschedules Starship/Superheavy launch to March 5, 2025

8:48 am

SpaceX has now rescheduled the eighth orbital test flight of its giant Starship/Superheavy rocket for tomorrow, March 5, 2025, with its one-hour launch window opening at 5:30 pm (Central).

The new launch time was caused by the launch scrub yesterday for unspecified issues with both the spacecraft.

I have once again embedded below the Space Affairs youtube live feed of this launch. The SpaceX X feed will only be available once it goes live at about 4:40 pm (Central).
» Read more

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Falcon 9 first stage lost after landing yesterday

8:40 am

According to an update on SpaceX’s website, the first stage of the Falcon 9 that launched 21 Starlink satellites (not 23 as initially reported) yesterday was lost shortly after landing.

The first stage booster returned to Earth and landed on the Just Read the Instructions droneship, which was stationed in the Atlantic Ocean ~250 nautical miles off the coast of Florida. Following the successful landing, an off-nominal fire in the aft end of the rocket damaged one of the booster’s landing legs which resulted in it tipping over.

This is only the second time in years that a first stage has been lost in this manner. After the previous occurrence last year during the Biden administration, the FAA grounded all SpaceX launches for several days, an action that indicated clearly an effort to harass the company for political reasons. I will be very surprised if this happens again, with Trump now in office.

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Ispace targets June 6, 2025 for the Moon landing its Resilience commercial lander

8:31 am

Map of lunar landing sites
Landing sites for both Firefly’s Blue Ghost and
Ispace’s Resilience

The Japanese startup Ispace announced today that its Resilience commercial lunar lander will attempt its touch down inside the Mare Frigoris region on the Moon on June 6, 2025, as shown on the map to the right.

Should conditions change, there are three alternative landing sites that are being considered with different landing dates and times for each. A decision about landing will be made in advance, but the window for landing is open from June 6 through June 8, 2025.

The company also reports that the spacecraft is healthy and operating exactly as expected.

Though Resilience was launched on the same Falcon 9 rocket that launched Firefly’s Blue Ghost lunar lander, it has taken a longer route to the Moon, which is why its landing will take place three months later.

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Starship/Superheavy test launch scrubbed

4:57 pm

Though the countdown got down to T-40 seconds, the eighth orbital test launch of SpaceX’s Starship/Superheavy was scrubbed today due to a number of issues that popped up relating to both spacecraft.

At the moment we do not know exactly what those issues were, and will likely never get detailed explanations. Nor do we know when the next launch attempt will occur, though SpaceX has additional scheduled opportunities over the next week.

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Falklands government approves changes that will allow SpaceX to provide Starlink service

3:38 pm

After a small negotiating kerfuffle, the executive committee of the Falklands government has now approved a major licensing fee change that will allow SpaceX to offer its Starlink service to island residences.

The Executive Committee (ExCo) of the Falkland Islands Government has officially approved a considerable reduction in the VSAT licence fee – it is “minded” to slash it from £5,400 to just £180 but it will stay at £5,400 until final agreement in ExCo in early May. This decision paves the way for Starlink to begin providing services in the Falkland Islands, creating a game-changing step towards modernising the Islands’ telecommunications.

It appears that getting this approval required a major grassroots effort, as the government had initially been reluctant to change anything, despite the fact that numerous people were already using Starlink terminals illegally because there were no other options for good internet access, especially because the government’s deal with OneWeb had produced no results.

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March 3, 2025 Quick space links

3:31 pm

Courtesy of BtB’s stringer Jay. This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.

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Sunspot update: Sunspot activity remains high but stable

3:02 pm

The uncertainty of science Time for my monthly update on our Sun’s sunspot cycle, based on NOAA’s monthly graph of the sunspot activity on the Earth-facing hemisphere of the Sun, but annotated by me with additional information.

The graph below shows that the number of sunspots in February continued the trend during this solar maximum of being significantly higher than the consensus prediction by a panel of NOAA solar scientists, as indicated by the red curve. At the same time, the count in February was well below the high point during the summer of 2024. Instead, though it went up slightly in February it remains at about the same level we have seen since September.
» Read more

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Watch the 8th orbital test flight of SpaceX’s Starship/Superheavy rocket

10:36 am

The eighth orbital test flight of SpaceX’s Starship/Superheavy rocket is scheduled to occur today, with a 60-minute launch window opening at 5:30 pm (Central). I have embedded below the Space Affairs live stream feed, as SpaceX’s X feed won’t be active until about 40 minutes before launch.

This flight has the same essential flight plan as the seventh flight, mainly because the prototype Starship on that previous flight was lost before it could achieve any of its goals. After Superheavy separates and attempts a chopstick landing at Boca Chica, Starship will go into a low orbit that will bring it down over the Indian Ocean. During the coast phase it will attempt to deploy four dummy Starlink satellites to test its deployment equipment, as well as do a Raptor-2 engine restart to demonstrate this works in order to prepare for a full orbit flight on a future test flight, possibly as soon as the next test flight.

Starship will also be testing a new configuration of thermal protection during its return, including leaving some places on its hull with no protection to see how those locations fare.

To paraphrase Elon Musk, prepare for excitment.

» Read more

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A galaxy surrounded by clusters of hot massive stars

8:44 am

A galaxy surrounded by hot massive stars
Click for original image.

Cool image time! The picture to the right, reduced and sharpened to post here, was taken by the Hubble Space Telescope of the galaxy NGC 5042, located about 48 million light years away. The picture combines data from all of Hubble’s available wavelengths from the ultraviolet to the infrared. From the caption:

Perhaps NGC 5042’s most striking feature is its collection of brilliant pink gas clouds that are studded throughout its spiral arms. These flashy clouds are called H II (pronounced “H-two”) regions, and they get their distinctive colour from hydrogen atoms that have been ionised by ultraviolet light. If you look closely at this image, you’ll see that many of these reddish clouds are associated with clumps of blue stars, often appearing to form a shell around the stars.

H II regions arise in expansive clouds of hydrogen gas, and only hot and massive stars [indicated by blue] produce enough high-energy light to create an H II region. Because the stars capable of creating H II regions only live for a few million years — just a blink of an eye in galactic terms — this image represents a fleeting snapshot of life in this galaxy.

The image also includes one star (distinguished by its four diffraction spikes) and a few background galaxies in yellow, the most obvious found in the upper and lower right.

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Russia and SpaceX complete launches

9:34 pm

Two more launches today. First, Russia launched a Glonass GPS-type satellite, its Soyuz-2 rocket lifting off from its Plesetsk spaceport in northern Russia. The rocket’s core stage, four strap-on boosters and upper stage all landed in planned zones within Russia. Whether they crashed near homes is unknown.

Next SpaceX launched another 23 Starlink satellites, its Falcon 9 rocket lifting off from Cape Canaveral in Florida. The first stage completed its fifth flight, landing on a drone ship in the Atlantic.

Note that though some launch sites indicate China also did a launch this weekend of the solid-fueled Kuaizhou-1A rocket built by the pseudo-company Expace, a translation of this French site indicates the launch was a failure.

The leaders in the 2025 launch race:

26 SpaceX
9 China
3 Russia
2 Rocket Lab

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