InSight still going, but barely

10:47 pm

InSight's daily power levels as of December 12, 2022

The InSight science team issued another update today, outlining the continuing low power levels produced by the Mars lander, barely enough to keep its seismometer, and nothing else, running.

As of Dec. 12, 2022, InSight is generating an average of ~285 watt-hours of energy per Martian day, or sol. The tau, or level of dust cover in the atmosphere, was estimated at .96 (typical tau levels outside of dust season range from 0.6-0.7).

I have added these numbers to the graph at right in order to show their context over time. Since the October dust storm the levels have held steady, even as the dust in the atmosphere has cleared somewhat.

Nonetheless, InSight’s future continues to be day-to-day. Should it fail to respond to two consecutive scheduled communications sessions, the team will declare it dead, and make no effort at recovery. Though they have been expecting this to happen since the end of October, the lander continues to hang on.

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Genesis cover

On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.

 

The print edition can be purchased at Amazon, any other book seller, or direct from my ebook publisher, ebookit. The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.


The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
 

"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News

December 12, 2022 Quick space links

3:27 pm

Courtesy of Jay, BtB’s stringer.

 

  • A look at Chinese pseudo-company Landspace

    • The review treats all these Chinese companies like private American companies, without recognizing that they do nothing without the approval and full supervision of the government.

 

 

 

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Strange terrain on the eastern floor of Gale Crater

1:10 pm

Strange terrain on the eastern floor of Gale Crater
Click for full image. For the inset, go here.

Though today’s cool image on the right, rotated, cropped, and reduced to post here, shows a small section on the floor of 96-mile-wide Gale Crater where Curiosity has been roving for the past decade, this picture looks at a different place. Curiosity landed in the northwest quadrant of the crater, and has been climbing the western slopes of Mount Sharp, which fills much of the crater’s interior. Today’s image looks at the crater’s floor on the east side of Mount Sharp.

The picture was taken on September 30, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). The dark areas are likely dune seas, while the golden section near the top of the color strip is likely dust, though that is not certain. (This bright yellow is unusual for this particular color filter.) The greenish color suggests coarser materials, such as larger boulders and rocks, though this is also not certain.

The inset zooms into some unusual polygon lines that cut across the dunes and cratered terrain. Such lines suggest that once, in the far past, the ground here was wet. When it dried out (being now in the very dry equatorial regions of Mars) it formed these cracks, similar in nature to the polygon cracks one sees in drying mud on Earth. Since the data from Curiosity when it was on the crater floor also suggests a lake once existed inside the crater, these cracks add weight to that conclusion.

The overview map below places Gale Crater in the larger context of Mars.
» Read more

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Conscious Choice cover

Now available in hardback and paperback as well as ebook!

 

From the press release: In this ground-breaking new history of early America, historian Robert Zimmerman not only exposes the lie behind The New York Times 1619 Project that falsely claims slavery is central to the history of the United States, he also provides profound lessons about the nature of human societies, lessons important for Americans today as well as for all future settlers on Mars and elsewhere in space.

 
Conscious Choice: The origins of slavery in America and why it matters today and for our future in outer space, is a riveting page-turning story that documents how slavery slowly became pervasive in the southern British colonies of North America, colonies founded by a people and culture that not only did not allow slavery but in every way were hostile to the practice.  
Conscious Choice does more however. In telling the tragic history of the Virginia colony and the rise of slavery there, Zimmerman lays out the proper path for creating healthy societies in places like the Moon and Mars.

 

“Zimmerman’s ground-breaking history provides every future generation the basic framework for establishing new societies on other worlds. We would be wise to heed what he says.” —Robert Zubrin, founder of the Mars Society.

 

All editions are available at Amazon, Barnes & Noble, and all book vendors, with the ebook priced at $5.99 before discount. All editions can also be purchased direct from the ebook publisher, ebookit, in which case you don't support the big tech companies and the author gets a bigger cut much sooner.

 

Autographed printed copies are also available at discount directly from the author (hardback $29.95; paperback $14.95; Shipping cost for either: $6.00). Just send an email to zimmerman @ nasw dot org.

Today’s blacklisted American: Judge orders Philadelphia to stop blacklisting Christopher Columbus

12:48 pm

What Philadelphia thinks of Columbus
How Philadelphia wants Christopher Columbus honored

The modern dark age: A state judge has now ordered the city of Philadelphia to remove the plywood box that has covered its statue of Christopher Columbus for the past two years.

In her ruling, Judge Mary Hannah Leavitt said that if the city disagrees with the “message” the statue sends, it can add its own plaque with what it wants to convey. “More to the point, the City accepted the donation of the Columbus statue in 1876. It has a fiduciary duty to preserve that statue, which it designated an historic object in 2017. The Columbus statue is not City property as is, for example, a City snowblower,” the judge wrote.

On orders by the city’s Democratic Party mayor, Jim Kenny, the statue had been covered during the worst of the riots in 2020, with Kenny’s stated intention to remove it entirely at some point.
» Read more

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NOAA once again over-predicts the hurricane count

12:22 pm

As it has done repeatedly in recent years, NOAA in 2022 once again over-predicted the hurricane count for this past hurricane season, predicting an above-normal season when it actually ended up to be well below-normal.

In late May and again in early August 2022 NOAA predicted that the year 2022 Atlantic Hurricane Season (between June to end November calendar period) would be an “above normal” season with 14-21 named storms, between 6-10 hurricanes including 3-6 major hurricanes (Category 3,4 and 5) as shown in NOAA’s diagram below.

Colorado State University’s Department of Atmospheric Science/Tropical Meteorology Project has compiled the year 2022 tropical storm data, establishing that, compared to its 30 year North Atlantic data records covering the Climatological period 1991-2020, the year 2022 hurricane season was below average in Named Storms, Named Storm Days, Hurricane Days, Major Hurricanes, Major Hurricane Days and Accumulated Cyclone Energy (ACE).

The many graphs at the link also demonstrate that the predictions that there will be an increase in extreme weather events due to increased use of fossil fuels is also proving false.

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Leaving Earth cover

Leaving Earth: Space Stations, Rival Superpowers, and the Quest for Interplanetary Travel, can be purchased as an ebook everywhere for only $3.99 (before discount) at amazon, Barnes & Noble, all ebook vendors, or direct from my ebook publisher, ebookit.

 

If you buy it from ebookit you don't support the big oppressive tech companies and I get a bigger cut much sooner.

 

Winner of the 2003 Eugene M. Emme Award of the American Astronautical Society.

 
"Leaving Earth is one of the best and certainly the most comprehensive summary of our drive into space that I have ever read. It will be invaluable to future scholars because it will tell them how the next chapter of human history opened." -- Arthur C. Clarke

New bill imposes new and odious regulation on private space stations and satellites

11:35 am

Congress and the FCC to private space: Nice business you got here.
Congress and the FCC to private space: “Nice business you
got here. Shame if something happened to it.”

On December 8, 2022, two bills, sponsored by both a Democrat and a Republican, were introduced in the House to give the Federal Communications Commission (FCC) the power to regulate and even block the launch of commercial private space stations, while also giving that agency the power to require companies to meet its arbitrary regulations on de-orbiting defunct satellites and stations.

House Energy and Commerce Committee Chairman Frank Pallone, Jr. (D-N.J.) and the ranking member, Rep. Cathy McMorris Rodgers (R-Wash.), said their legislation is needed to modernize the FCC for the rapidly changing space industry. Their two bills — the Satellite and Telecommunications Streamlining Act and Secure Space Act — seek to update regulations covering foreign ownership, space sustainability, license processing timelines, and satellite spectrum sharing.

The key language in the first bill [pdf] is this:
» Read more

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A wall of smoke, as seen by Hubble

9:57 am

A wall of smoke, as seen by Hubble
Click for full image.

Using the Hubble Space Telescope, astronomers have produced a magnificent image of an interstellar cloud, cropped and reduced to post here. From the caption:

A portion of the open cluster NGC 6530 appears as a roiling wall of smoke studded with stars in this image from the NASA/ESA Hubble Space Telescope. NGC 6530 is a collection of several thousand stars lying around 4350 light-years from Earth in the constellation Sagittarius. The cluster is set within the larger Lagoon Nebula, a gigantic interstellar cloud of gas and dust. It is the nebula that gives this image its distinctly smokey appearance; clouds of interstellar gas and dust stretch from one side of this image to the other.

Astronomers investigated NGC 6530 using Hubble’s Advanced Camera for Surveys and Wide Field Planetary Camera 2. They scoured the region in the hope of finding new examples of proplyds, a particular class of illuminated protoplanetary discs surrounding newborn stars. The vast majority of proplyds have been found in only one region, the nearby Orion Nebula. This makes understanding their origin and lifetimes in other astronomical environments challenging.

The first proplyds were seen in the very first images taken by Hubble after it was fixed and could finally take sharp pictures. That so few have been seen since is thus somewhat surprising.

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Remembering Apollo 17, fifty years after the last manned mission to the Moon

9:37 am

LRO oblique view of Apollo 17 landing site
Click for full image.

Link here.

The article comes from the Lunar Reconnaissance Orbiter (LRO) science team, and includes a number of LRO photos of the landing site, including the oblique annotated image to the right, reduced to post here. As the article notes:

The Apollo 17 crew was the last of an era in human space exploration and the last to set foot on the Moon. Fifty years later, the landing sites, hardware, and footsteps remain delicately preserved on the lunar surface. Join the LRO team as we commemorate their inspiring achievements with additional images, research, maps, interactive sites, and a dedicated video. LRO continues to image the Apollo sites whenever possible, under multiple lighting conditions, and combine these images into interactive sites, like the Apollo 17 Temporal Traverse. The Lunar QuickMap 3D tool can be used to preview the Apollo landing sites and search for LROC images of the areas. For downloadable maps of the Taurus-Littrow Valley, visit the Map Sheets section on our downloads page here. Finally, the Apollo 17 fiftieth anniversary video below presents highlights of the mission with landing site views reconstructed using LROC images and topography.

I have embedded that video below. It does a marvelous job summarizing this mission, which in many ways remains the most daring human exploration mission since Columbus dared cross an ocean in a tiny ship only slightly larger than many lifeboats.
» Read more

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Update on the ten cubesats launched by SLS

9:16 am

Link here.

At this moment six of the ten cubesats either accomplished their mission successfully or are still operating, while four cubesats failed entirely.

Of those still working, two will go into lunar orbit and try to find evidence of both hydrogen and ice on the Moon. A third is testing “solid iodine” thrusters, while a fourth will observe how yeast samples react to a long exposure in deep space. A fifth cubesat is a joint NASA-JAXA mission, and is testing how to fly a smallsat in the low gravity of a Lagrangian point.

Finally, an Italian cubesat was used to successfully take images of the Moon and Orion, and has completed its mission.

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China’s Long March 4C rocket launches two satellites

9:05 am

Long March 4C launch

China today launched two experimental technology satellites, using its Long March 4C rocket from an interior spaceport.

The launch pictures, as captured on the right, show what appear to be panels falling off the rocket as it lifts off. Note how some of these falling panels are red, while the Chinese flag at the top of the rocket appears to be partly broken off in the later picture. The fairing and shell of the upper stage in the second picture also appear changed.

The Chinese state-run press claims the satellites reached orbit as planned, but these pictures suggest otherwise. If part of the fairing and outside of the upper stage fell off, there is a good chance the payload was damaged during max-q, the period soon after launch when rockets undergo the greatest stress in the Earth’s thicker atmosphere.

UPDATE from stringer Jay: Video of the launch. The panels continue to drop off for a considerable time.

Assuming this launch was a success, however, the 2022 launch race continues to heat up, with China vying to beat SpaceX after trailing the American company for most of the year.

58 China
56 SpaceX
21 Russia
9 Rocket Lab
8 ULA

The U.S. still leads China 80 to 58 in the national rankings, but trails the entire world combined 88 to 80.

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Orion successfully splashes down in the Pacific

8:42 pm

NASA’s Orion capsule today successfully returned from a three week trip around the Moon, splashing down in the Pacific where it was successfully recovered.

The next Artemis flight will be a manned one, using SLS and Orion to fly around the Moon. It will also be the first time Orion will use its full environmental system, with humans on board. Though presently scheduled for May 2024, it is almost certainly not going to fly before 2025.

The actual Artemis manned lunar landing will follow, no sooner than two years after that. As presently designed, that mission requires the establishment of the Lunar Gateway station — astronauts can be transferred from Orion to Starship and back again, and that station is likely not going to be ready in this time frame.

As I said yesterday, I predict the two already purchased private Starship missions around the Moon, paid for by Yusaku Maezawa and Jared Isaacman, will happen first. Both will certainly beat NASA’s planned landing on the Moon. I also expect both to beat that Orion manned fly-around in ’24-’25. And each will cost pennies compared to the entire SLS/Orion program, while actually making a profit that will be used to further development and more manned private flights.

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SpaceX successfully launches Ispace’s Hakuto-R private mission to Moon

12:51 am

Lunar map showing Hakuto-R's landing spot
Hakuto-R’s planned landing site is in Atlas Crater.

Using its Falcon 9 rocket, SpaceX tonight successfully launched Ispace’s Hakuto-R lunar lander, the first private mission attempting to softly land on the Moon.

The Falcon 9 first stage completed its fifth flight, landing successfully at Cape Canaveral.

Hakuto-R, which is actually the first of two missions, carries seven payloads, including two small rovers, Rashid, which is the United Arab Emirates first lunar mission, and a smaller rover built by Ispace. Both will operate for about a week, one lunar day. Hakuto-R will land on the Moon in April, 2023.

A second payload is a cubesat from JPL, called Lunar Flashlight. It will go into lunar orbit, testing new fuel technologies while also attempting to identify water in the permanently shadowed craters at the lunar south pole.

The leaders in the 2022 launch race:

57 China
56 SpaceX
21 Russia
9 Rocket Lab
8 ULA

The U.S. now leads China 80 to 57 in the national rankings, but trails the entire world combined 87 to 80.

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NASA extends Boeing’s contract to produce more SLS rockets

10:30 am

NASA yesterday announced that it will pay Boeing $3.2 billion for two more SLS rockets.

NASA has finalized its contract with Boeing of Huntsville, Alabama, for approximately $3.2 billion to continue manufacturing core and upper stages for future Space Launch System (SLS) rockets for Artemis missions to the Moon and beyond.

Under the SLS Stages Production and Evolution Contract action, Boeing will produce SLS core stages for Artemis III and IV, procure critical and long-lead material for the core stages for Artemis V and VI, provide the exploration upper stages (EUS) for Artemis V and VI, as well as tooling and related support and engineering services.

All this really means is that NASA is going depend on SLS and Orion to fly its astronauts to and from the Moon, and because of that its pace of flight will be — at best — slow and long-drawn out. For example, this new order extends the contract out to 2028. It will thus leave plenty of time for SpaceX and other nations to get there first.

I predict that the private Starship missions paid for by Yusaku Maezawa and Jared Isaacman will both fly before these two new Artemis missions. You heard it here first.

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Chinese upper stage disintegrates in orbit

10:21 am

A Chinese Long March 6 upper stage, launched in on November 11, 2022, has disintegrated into more than 350 in orbit and now pose a threat to other orbiting spacecraft.

The Long March 6A rocket launched from Taiyuan, north China, on Nov. 11, successfully inserting the Yunhai 3 environmental monitoring satellite into its intended orbit.

The upper stage of the rocket, however, apparently suffered a breakup event shortly thereafter. On Nov. 12, the U.S. Space Force’s 18th Space Defense Squadron (18SDS) reported that it was tracking at least 50 discrete pieces of orbital debris from the rocket body. Ongoing tracking from 18SDS, which focuses on space domain awareness, now states that the debris cloud has grown to 350 objects associated with the rocket stage.

Based on the data, it appears the break-up occurred because the stage had an explosive event. It could have been programed to fire its engine to quickly de-orbit it and something went wrong. Or not. The Chinese have not demonstrated much concern about such issues.

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December 9, 2022 Quick space links

3:07 pm

Courtesy of BtB’s stringer Jay.

 

 

 

 

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Ancient lava flows down the flanks of the solar system’s largest volcano

11:52 am

Lava flows on Olympus Mons
Click for full image.

Cool image time! The photo to the right, cropped, reduced, and sharpened to post here, was taken on October 2, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows what appears to be very old and eroded lava on the northeast flanks of Olympus Mons, the largest volcano on Mars as well as the entire solar system. About 600 miles across, from the edge to its peak, Olympus rises about 54,000 feet, with an actual height relative to Mars’ “sea level” of just under 70,000 feet, more than twice as high as Mount Everest on Earth.

The white arrow show the downward grade. Several different flows can be seen throughout the picture, some confined to a central channel with smooth aprons of overflows on either side. Others are more broken and less coherent, and suggest that either the flows were inherently different, or are much older and have deteriorated with time.
» Read more

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Pushback: Students win $90K from University of Idaho for restricting their free speech

11:00 am

Idaho University bans religious speech
This college is still hostile to free speech.

Bring a gun to a knife fight: Three students who were punished last spring by the University of Idaho (UI) for daring to disagree publicly with an activist for the queer agenda have now won a $90K settlement as well as getting their records fully cleared.

As part of the settlement, university officials permanently rescinded the no-contact orders they had issued against Peter Perlot, Mark Miller, and Ryan Alexander, members of the Christian Legal Society chapter at the university, and Professor Richard Seamon, CLS’s faculty advisor, and paid $90,000.

I reported this case when it happened, noting that the university had essentially “decided that the only opinions that could be allowed were those that agreed with the queer political agenda, and acted unilaterally to punish these Christians for refusing to bow to that rule.” The university has now lost, and lost badly.
» Read more

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Astronomers confirm Webb galaxies from the early universe

9:40 am

Astronomers using Webb have now confirmed with spectroscopy the age of at least four galaxies from the very very early universe, existing only a short time after the theorized Big Bang.

Four of the galaxies studied are particularly special, as they were revealed to be at an unprecedentedly early epoch. The results provided spectroscopic confirmation that these four galaxies lie at redshifts above 10, including two at redshift 13. This corresponds to a time when the universe was approximately 330 million years old, setting a new frontier in the search for far-flung galaxies. These galaxies are extremely faint because of their great distance from us.

The scientists had aimed Webb at Hubble’s Ultra Deep Field, doing a long infrared exposure lasting 28 hours over three days in order to gather the faintest infrared radiation (that Hubble could not see) and thus the most distant galaxies. The spectrum of individuals stars was then measured, which indicating their redshift and their estimated age.

The astronomers will next aim Webb at the more famous Hubble Deep Field, the first such long exposure that optical telescope took back in the late 1990s.

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SOFIA to retire to Arizona museum

9:28 am

NASA yesterday announced that its airborne 747 SOFIA telescope will be retired to the Pima Air & Space Museum in Tucson, Arizona, making its final flight there December 13, 2022.

Pima, one of the world’s largest aerospace museums, is developing plans for when and how the SOFIA aircraft will eventually be on display to the public. Along with six hangars, 80 acres of outdoor display grounds, and more than 425 aircraft from around the world, Pima also has its own restoration facility where incoming aircraft like SOFIA are prepared for museum immortalization after their arrival.

While the idea of SOFIA, putting a astronomical telescope on an airplane to get it above most of the atmosphere, has some merit, this particular NASA project was always too costly and simply produced too little science to justify its expense.

In many ways, this museum display will provide one of the best ways to see a 747 itself, now also retired.

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NASA awards Collins contract to build spacesuits for space station spacewalks

9:22 am

Capitalism in space: NASA yesterday awarded Collins Aerospace a $97.2 million contract to build spacesuits for the agency’s future space station spacewalks.

In June NASA had picked Collins and Axiom as the vendors who would build spacesuits for the agency. In September it purchased its its first Artemis Moon spacesuits from Axiom. This new contract has NASA buying its first new space station suits from Collins.

In both cases, the companies own their designs, and can thus sell them to the other private space stations presently under construction.

This contract award follows NASA abandonment of its own failed spacesuit effort, which spent fourteen years and a billion dollars and produced nothing.

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Astrobotic’s Peregrine lunar lander passes launch tests

9:14 am

Astrobotic’s first demonstration lunar lander, dubbed Peregrine, has passed its vibration and acoustic tests, demonstrating it can survive launch on ULA’s Vulcan rocket, presently scheduled for the first quarter of ’23.

The lander is now undergoing electromagnetic interference testing, which will be followed by thermal vacuum tests. Once those tests are complete, the company said, it will ship the lander to Cape Canaveral, Florida, to be integrated with the Vulcan Centaur for a launch currently scheduled in the first quarter of 2023. That launch will be the inaugural flight of the Vulcan Centaur.

A great deal will be riding on that first Vulcan launch, both for Astrobotic and ULA.

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Billionaire Maezawa chooses his passengers for Starship lunar flight

9:07 am

Japanese billionaire Yusaku Maezawa yesterday announced the eight passengers he will take with him on his private Starship flight around the Moon, its launch date still not set.

The full list of ten (including the two back-up passengers) is a wide mixture of individuals with a wide range of disciplines coming from a wide range of countries. For those interested in space, the one name that stood out and was very familiar was Tim Dodd, created of Everyday Astronaut. He created a video describing his selection as well as Maezawa’s entire project, which I have embedded below:
» Read more

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Last 747 rolls off assembly line

8:58 am

Boeing earlier this week completed assembly of its very last 747 airplane, the 1,574th such plane built in the past half century.

Still in its iridescent green protective coating, the giant aircraft was towed out of the widebody aircraft factory in a low-key exercise without any fanfare. Once the 747 has been cleared, it will be flown to another Boeing facility where it will be painted in the Atlas Air livery in anticipation of final delivery to the customer next year.

The 747 was born out of a failed bid by Boeing to market a large jet transporter to the US military in the 1960s. That contract for what became the C-5A Galaxy eventually went to Lockheed, but Boeing was convinced that its basic design, with its high-bypass turbofan engine, could be reworked for the civilian market, which was booming at the time.

On January 9, 1969, the first 747 prototype took to the skies over Washington state. It was a staggering 225 feet (68.5 m) long, had a wing area larger than a basketball court, and the tail was as high as a six-story building.

Without question the 747 was one of the safest and well designed airplanes ever built. It was years after that first flight before one was involved in an accident, and that was not due to a failure of the plane itself. It also flew like a dream, its large size making it look like it was lumbering slowly in the air. Its retirement is almost entirely related to fuel cost-savings, since the 747 has four engines and thus more fuel than more modern planes.

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China completes two launches successfully

8:48 am

China today successfully completed two launches:

First, China’s government used its Long March 2D rocket to launch a classified Earth observation satellite into orbit. The rocket launched from an interior spaceport, dropping its expendable first stages within China.

Next, the China Academy of Launch Vehicle Technology (CALT) successfully completed the inaugural launch of its Smart Dragon-3 solid-fueled rocket, putting 14 smallsats into orbit. The rocket launched from a platform at sea, so its expendable stages fell in the ocean. Though the rocket is aimed at launching commercial payloads, it is still a Chinese government project using military missile technology.

The leaders in the 2022 launch race:

57 China
55 SpaceX
21 Russia
9 Rocket Lab
8 ULA

The U.S. still leads China 79 to 57 in the national rankings, but trails the entire world combined 87 to 79.

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December 8, 2022 Quick space links

5:22 pm

Courtesy of Jay, BtB’s Twitter stringer.

 

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Webb’s infrared view of the Southern Ring Nebula

4:57 pm

Two views of Southern Ring Nebula by Webb
Click for original image.

The two images to the left were produced by the Webb Space Telescope, showing in false colors the Southern Ring Nebula as seen by two of Webb’s infrared cameras.

The two images shown here each combine near-infrared and mid-infrared data to isolate different components of the nebula. The image at [top] highlights the very hot gas that surrounds the central stars. The image at [bottom] traces the star’s scattered molecular outflows that have reached farther into the cosmos.

Based on the data, astronomers posit that up the system could have as many as five stars orbiting each other, with three as yet unseen, or the inner ones might no longer exist, having been absorbed by the bigger stars.

It’s possible more than one star interacted with the dimmer of the two central stars, which appears red in this image, before it created this jaw-dropping planetary nebula. The first star that “danced” with the party’s host created a light show, sending out jets of material in opposite directions. Before retiring, it gave the dim star a cloak of dust. Now much smaller, the same dancer might have merged with the dying star – or is now hidden in its glare.

A third partygoer may have gotten close to the central star multiple times. That star stirred up the jets ejected by the first companion, which helped create the wavy shapes we see today at the edges of the gas and dust. Not to be left out, a fourth star with an orbit projected to be much wider, also contributed to the celebration. It circled the scene, further stirring up the gas and dust, and generating the enormous system of rings seen outside the nebula. The fifth star is the best known – it’s the bright white-blue star visible in the images that continues to orbit predictably and calmly.

Much of this remains mere theory, based on the available data. Nonetheless, the data from many such planetary nebula continues to suggest their strange and wonderful shapes are created by multiple stars, acting as a mix-master to churn up the nebula’s dust.

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