Category: Points of Information

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

Engineers regain contact with Proba-3’s Coronagraph probe

8:36 am

The Proba-3 mission
The Proba-3 mission. Click for original.

A month after all contact was lost with the Coronagraph probe of Europe’s two-spacecraft Proba-3 solar observatory, engineers have regained contact with it this week, and have been able to place it in safe mode in preparation for re-establishing science operations.

After more than a month of silence, ESA’s ground station in Villafranca, Spain, received telemetry from the Coronagraph spacecraft. Telemetry is a package of data sent by a spacecraft including information on its temperature, voltages, and health of onboard systems.

The Coronagraph is now in safe mode and stable, and the mission team and operators are running health checks on the spacecraft to understand if any parts of it have been damaged.

The spacecraft’s solar panel is facing the Sun, powering the essential electronics on board, and charging the battery with the remaining power.

Before it can resume observations engineers need to get the spacecraft back up to operating temperature after a month without power.

As shown in the graphic to the right, the Coronograph satellite is the heart of this mission. It records the data, available because the Occulter blocks the Sun from view so that the corona, the Sun’s atmosphere, can be seen. It is almost a miracle that it has survived that month, and can soon resume observations.

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Blue Origin files FCC application for its own 51,600 data center satellite constellation

8:01 am

Blue Origin yesterday filed with the Federal Communications Commission (FCC) an application to launch 51,600 satellites, dubbed Project Sunrise, aimed at creating its own data center constellation in orbit.

The proposed constellation includes up to 51,600 satellites operating in sun-synchronous orbits at altitudes ranging from 500 to 1,800 kilometers. To manage data traffic, the system will primarily use optical links and mesh backhaul networks, supplemented by Ka-band spectrum for telemetry, tracking, and command operations. The spacecraft will utilize multiple antenna variations to maintain efficient coverage across various orbital planes.

You can read the full application here [pdf].

Jeff Bezos
Jeff Bezos, maybe the world’s leader in chutzpah.

Blue Origin also requests several waivers from the FCC’s normal new satellite license requirements, including what I think is a request to waive the FCC’s normal requirement that the applicant launch half its constellation within six years of license approval and complete the constellation three years later. Failure to do so results in financial penalties. The rules were created to prevent companies from getting licenses to grab spectrum from competitors with no intent to launch.

That this Jeff Bezos company is requesting this waiver is what in Yiddish is called chutzpah! Bezos’ other company, Amazon, is clearly going to fail to meet its own license timetable in launching its Leo internet constellation, and was recently lambasted by FCC chairman Brenden Carr for doing so. For Blue Origin to now request this waiver truly is an example of unbelievable gall. I can’t imagine the FCC will do so.

Either way, the competition to put up a lot of satellites continues to grow, with SpaceX and Blue Origin in the best position to make their constellations profitable, because both have their own launch vehicles.

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March 19, 2026 Quick space links

2:44 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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SpaceX completes a Starlink launch

2:14 pm

UPDATE: It appears The Russian launch described below did not occur as indicated by the story I linked to. There is no confirmation anywhere on the web that the launch occurred. If it had, the nature of the payload would have guaranteed some story in Russia’s state-run press. See also this X post, which suggests the lack of information about the scrub is related to Russian concerns about Ukrainian drone attacks.

Original post
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There were two launches today, both of which sent up a cluster of satellites for broadband internet constellations.

First, Russia launched the first 16 satellites in its proposed 700+ satellite Russvet internet constellation, its Soyuz-2 rocket lifting off from its Plesetsk spaceport in northeast Russia. The satellites are built by the Russian company Bureau-1440, which hopes to have the entire constellation in orbit by 2035. Considering that this constellation is designed to compete with Starlink, its pace of launch is ridiculously low. SpaceX can generally launch 700 Starlink satellites in about a month, not ten years. By the time Russia gets this constellation in orbit it will be woefully obsolete.

SpaceX meanwhile proved this point today by continuing its brisk pace in Starlink launches. It successfully placed 29 more Starlink satellites in orbit, its Falcon 9 rocket lifting off from Cape Canaveral Space Force Station in Florida.

The first stage (B1077) completed its 27th flight, landing on a drone ship in the Atlantic, only 26 days after its previous flight. This flight also moved the booster up to just behind the space shuttle Columbia in the rankings of the most reused launch vehicles:

39 Discovery space shuttle
33 Atlantis space shuttle
33 Falcon 9 booster B1067
32 Falcon 9 booster B1071
31 Falcon 9 booster B1063
30 Falcon 9 booster B1069
28 Columbia space shuttle
27 Falcon 9 booster B1077

Sources here and here.

The leaders in the 2026 launch race:

35 SpaceX
12 China
3 Rocket Lab
2 Russia (corrected)

SpaceX continues to lead the entire world combined in total launches, as it did in both ’24 and ’25.

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Scientists compile catalog of the 69 known rocky exoplanets in the habitable zone

12:49 pm

Graph of the 45 most habitable known exoplanets
Credit: Gillis Lowry / Pablo Carlos Budassi.
Click for original at full resolution.

Scientists reviewing the more than 6,000 exoplanets so far discovered have now compiled a detailed catalog describing the 69 known rocky exoplanets that are also in the habitable zone.

The graph to the right, cropped and reduced to post here, shows the 45 exoplanets most likely to be habitable, with the amount of energy they get from their star measured relative to that of Earth and the Sun (shown center top). You can read their paper here. From the press release:

The researchers pinpointed 45 rocky worlds that may support life in the habitable zone, and another 24 in a narrower 3D habitable zone that makes a more conservative assumption of how much heat a planet can take before it loses its habitability.

They include some famous exoplanets, including Proxima Centauri b, TRAPPIST-1f and Kepler 186f, as well as others that are not as well known, such as TOI-715 b. The most interesting planets of those listed, according to the authors, are TRAPPIST-1 d, e, f and g, which are 40 light-years from Earth, as well as LHS 1140 b, which is 48 light-years away. Whether these planets could have liquid water depends in part if they can hold an atmosphere.

The worlds that get light from their stars most similar to what modern Earth receives from the Sun are the transiting planets TRAPPIST-1 e, TOI-715 b, Kepler-1652 b, Kepler-442 b, Kepler-1544 b and the planets Proxima Centauri b, GJ 1061 d, GJ 1002 b, and Wolf 1069 b, which make their stars wobble.

The paper includes tables listing the best exoplanets that do transits of their stars, the best with the oldest estimated ages, and the best for testing the limits of the habitable zone itself. As the researchers say in their abstract:

The resulting list of rocky exoplanet targets in the HZ will allow observers to shape and optimize search strategies with space- and ground-based telescopes – such as the James Webb Space Telescope (JWST), Extremely Large Telescope (ELT), Habitable Worlds Observatory (HWO), and Large Interferometer For Exoplanets (LIFE) – and design new observing strategies and instruments to explore these worlds, addressing the question of the limits of exoplanet surface habitability.

In other words, the focus of exoplanet research is now shifting from simply finding these planets to studying them directly, with the potentially habitable worlds listed above the most interesting of all. Astronomers might not find alien life or civilizations on these worlds, but at a minimum they will be doing the first preliminary scouting for humanity’s the first interstellar missions, with the Trappist-1 solar system appearing to head the list.

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Uranus’s moon Oberon, of which we know little

11:38 am

Uranus' five biggest moonsThe historically known moons of Uranus. Click for original NASA press release.

Oberon, as seen by Voyager-2
Click for original image.

Today we finish our week-long tour of the five largest moons of Uranus, all discovered by astronomers before the start of the space age, and imaged successfully if not very completely by Voyager-2 when it did its fly-by of the planet on January 24, 1986. The gallery of these moons above was taken by the spacecraft when it was on approach, still about three million miles from Uranus, and shows them in order from the innermost on the left to the outermost on the right. They are also scaled to show their relative sizes. To see Voyager-2’s close-up images of the four inner moons, posted earlier this week, go here, here, here, and here.

The picture to the right, cropped slightly to post here, is Voyager-2’s only high resolution image of Oberon, the outermost moon of this group. From NASA’s press release:

This Voyager 2 picture of Oberon is the best the spacecraft acquired of Uranus’ outermost moon. The picture was taken shortly after 3:30 a.m. PST on Jan. 24, 1986, from a distance of 410,000 miles. The color was reconstructed from images taken through the narrow-angle camera’s violet, clear and green filters.

The picture shows features as small as 7 miles on the moon’s surface. Clearly visible are several large impact craters in Oberon’s icy surface surrounded by bright rays similar to those seen on Jupiter’s moon Callisto. Quite prominent near the center of Oberon’s disk is a large crater with a bright central peak and a floor partially covered with very dark material. This may be icy, carbon-rich material erupted onto the crater floor sometime after the crater formed. Another striking topographic feature is a large mountain, about 6 km (4 mi) high, peeking out on the lower left limb.

Oberon is about 946 miles in diameter, making it the tenth-largest moon in the solar system. Because of the quickness of Voyager-2’s fly-by, it could get no closer images, and none of the planet’s nightside. Thus, only 40% of the surface has been photographed, and at not very high resolution.

Later spectroscopy from Hubble and other telescopes suggests there is water ice on the surface. Other data suggests Oberon may have a liquid underground ocean, but that conclusion is highly uncertain. Other than these vague facts and the image to the right, we essentially know almost nothing about this moon. Like Titiania, Uranus’s largest moon, Voyager-2’s data merely gave us a tantalizing glimpse, and that glimpse is now forty years old. No other mission has been there since, and none is planned in the near future.

Tomorrow, to summarize this tour, I will outline further what little we know of Uranus and its moons

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German rocket startup signs deal to launch from SaxaVord spaceport in Scotland

9:56 am

Proposed or active spaceports in North Europe
Proposed or active spaceports in North Europe

The German rocket startup HyImpulse yesterday signed a contract with the SaxaVord spaceport on the Shetland Islands in Scotland to do a suborbital test launch at SaxaVord later this year.

HyImpulse has agreed a launch deal with the Unst spaceport, with the aim of a suborbital launch in quarter three of 2026. It will be the second launch of the company’s SR75 suborbital launch vehicle following a successful lift-off in Australia in 2024, which used a hybrid propulsion system involving paraffin “candle wax” and liquid oxygen. HyImpulse said that initial launch, from Koonibba, showed the vehicle could demonstrate “stable flight validating system performance under operational conditions”.

Under the agreement, SaxaVord will provide launch infrastructure and operational support for the launch of the SR75.

HyImpulse is the second German rocket startup to sign a deal to launch from SaxaVord. Rocket Factory Augsburg plans its second attempt to do an orbital launch from there later this year. In 2024 it was gearing up to do that launch but an explosion during a full static fire test of the rocket’s first stage killed that plan.

Considering the red tape the United Kingdom has imposed on rocket companies, bankrupting two and delaying all launches for years from both SaxaVord and the other proposed spaceport in Sutherland, Scotland, I am surprised these two rocket companies have signed these deals. Maybe the UK’s Civil Aviation Authority (CAA) has been reformed and eased that red tape.

Or maybe HyImpulse will find its plans blocked by the CAA as that agency once again ponders at glacial pace the issuing of a new launch license. Stay tuned.

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OHB wins $285 million contract to build weather satellite constellation for ESA

9:36 am

ESA logo

Capitalism in space The Swedish subsidiary of the European aerospace company OHB yesterday announced it has won a $285 million contract from the European Space Agency (ESA) to build and maintain a six satellite weather satellite constellation.

The company had already successfully launched and tested a single demo satellite, proving a small satellite could do the job.

The foundation for this is the Arctic Weather Satellite (AWS), which OHB Sweden successfully placed in orbit as a demonstrator more than a year ago. The OHB SE subsidiary developed the small satellite on behalf of the European Space Agency ESA in record time, using a deliberately chosen New Space approach. Only three years passed between contract award and launch.

This new constellation is dubbed EUMETSAT Polar System – Sterna (EPS-Sterna), and will supplement and eventually replace the expensive government-built Eumetsat weather constellation presently in orbit.

OHB Sweden is the prime contractor for the delivery of the satellites for the EPS Sterna constellation. The consortium also includes Omnisys in Sweden as the supplier of the microwave instruments, which constitute the primary meteorological payload. A total of 20 satellites will be delivered under the contract. The industrial team includes approximately 30 companies. Germany is also strongly represented by SMEs that will contribute key hardware for the instrument and the satellite platform. The satellites will be procured by EUMETSAT through ESA. EUMETSAT itself will develop the ground segment, procure and provide the launch services, operate the satellites, manage the constellation and distribute the data through its data distribution mechanisms, which has a planned operational lifetime of 13 years.

This contract is another example of Europe’s fast shift in the past three years from the government model to the capitalism model. It took ESA almost a decade to finally decide to make that shift, but once it did it seems to be moving far faster than NASA did to implement it.

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Update on SpaceX’s preparations for the 12th orbital test flight of Starship/Superheavy

9:22 am

Link here. The testing has apparently verified the fueling system of Superheavy at the new launchpad.

Starship Flight 12 took another step toward launch, with Booster 19 completing an initial test campaign on the newly commissioned Pad 2 at Starbase, Texas. Culminating in a short Static Fire test, the series of tests was a first for Pad 2, the Block 3/V3 Super Heavy Booster, and for the upgraded Raptor 3 outside of single engine testing.

As the inaugural vehicle to undergo operations on this pad, B19’s campaign served as both a booster qualification test and a commissioning milestone for the expanded launch infrastructure, paving the way for a long-awaited static fire test of its Raptor 3 engines.

Lots of details worth reading. Ground testing will now shift to Starship. All in all, it does appear that an early April launch is likely.

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Rocket Lab wins $190 million hypersonic test contract from War Department

9:14 am

War Department logo

Rocket Lab yesterday announced it has won a $190 million contract from War Department to do another twenty suborbital test launches using its HASTE first stage version of its Electron rocket.

Rocket Lab Corporation … today announced the signing of its single largest launch agreement yet: a $190 million contract for a block buy of 20 hypersonic test flights with its HASTE launch vehicle for the Test Resource Management Center (TRMC) Multi-Service Advanced Capability Hypersonic Test Bed (MACH-TB) 2.0 program – a U.S. Department of War effort executed in partnership with Naval Surface Warfare Center Crane Division (NSWC Crane) to rapidly accelerate hypersonic flight tests and advanced aerospace technologies shaping the future of defense missions.

Under MACH-TB 2.0 Task Area 1, led by Kratos Defense & Security Solutions, Inc, Rocket Lab will perform 20 hypersonic test flights with its HASTE launch vehicle over a four-year period. The first of these 20 new missions is expected to take place within months of contract signing, demonstrating Rocket Lab’s operational efficiency and ability to move quickly to meet modern warfare demands.

This is the work that Stratolaunch had hoped to grab with its giant Roc airplane and Talon hypersonic test vehicle. Rocket Lab saw an opportunity and quickly reconfigured the first stage of its Electron rocket for the same work, dubbing this version HASTE. In the past three years both it and Stratolaunch have done hypersonic test flights, but Rocket Lab’s work has been more frequent and extensive, doing seven HASTE hypersonic launches to one test by Stratolaunch. That success apparently convinced the military to give Rocket Lab this larger new contract.

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Scientists: Shadowcam images suggest there is little water in permanently shadowed lunar craters

8:58 am

Shadowcam-LRO mosaic
The floor of Shackleton Crater showing no obvious ice deposits,
as seen by Shadowcam, imposed on a Lunar Reconnaissance Orbiter
image. The black cross marks the south pole. Click for original image.

In a new paper published yesterday, the science team for the low-light Shadowcam instrument on South Korea’s lunar orbiter Danuri confirmed their earlier conclusion from 2024, that there appears to be far less water ice than expected in the permanently shadowed lunar craters near the Moon’s south pole. From their abstract:

We used the high-reflectance and forward-scattering optical properties to search for water ice in lunar PSRs [permanently shaded regions]. We found no evidence of widespread water ice in PSRs at abundances above the detection limit of 20 to 30 wt % but could not rule out widespread low-content water ice. A few small locations with both high reflectance and forward-scattering behavior were observed, which could be consistent with >10 wt % ice.

And from their conclusion:

Our manual examination of ShadowCam radiance images that cover all lunar PSRs suggests either that most of the lunar PSRs lack surface ice exposures or that their ice concentration is below the detection limit, approximately 20 to 30 wt % on the basis of the visible reflectance enhancement, which aligns well with previous ShadowCam findings. Only a few candidate high-reflectance anomalies were seen, which, if they are water ice, is consistent with previous sparse detections of lunar surface water ice.

There is still a chance there is water ice in these permanently shadowed craters, but it appears once again that if it exists, it will likely require processing to extract it from the soil, and there won’t be that much available regardless.

These results are not conclusive, but they do suggest that the south pole of the Moon will not be as ideal a location for a lunar base as previously imagined.

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