Tag: engineering

SpaceX launches 60 more Starlink satellites

9:37 pm

Capitalism in space: SpaceX today successfully launched another sixty Starlink satellites, bringing the total in orbit to over 800.

The company also recovered the first stage, completing its third flight. The fairings were to be picked up in the ocean, rather than caught in a ship’s net, as the last launch one fairing broke the net. SpaceX engineers might have determined ocean recovery is now safer and sufficient for reuse.

This was also the company’s 100th successful launch and its 63rd successful first stage recovery.

The leaders in the 2020 launch race:

26 China
18 SpaceX
11 Russia
4 ULA
4 Europe (Arianespace)

The U.S. now leads China 28 to 26 in the national rankings.

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OSIRIS-REx sample grab so successful they are losing material

2:47 pm

The samples from Bennu
Click for full two frame gif movie.

In a briefing today and press release, the OSIRIS-REx science team announced that they estimate that they have gathered a lot of material from the asteroid Bennu, at least 100s of grams, about twice the minimum of what they hoped to get.

In fact, images of the TAGSAM sample grab equipment suggest that there are some larger rocks lodged in its opening (preventing the flap from closing), and that the small movements they have done to photograph it has caused some of the captured material to escape. The image to the right shows this. You can see floating specks and their shadows (the horizontal streaks) that have escaped. At about 9 o’clock you can see a curve in the contact between a lighter material and blackness to its outside, bending towards the center of the TAGSAM. At other exposures they can clearly see a rock there, distorting the shape and thus preventing the flap from closing properly.

Because of this, they are foregoing the spin maneuver that would have weighed the sample, as well as one engine burst that would have slowed the spacecraft’s movement away from Bennu.

This means they will not know the exact amount captured until the sample gets back to Earth. This is a gamble, but they are confident that they have gotten a lot of material. According to Dante Lauretta, the principal investigator, the sample grab-and-go “got very down” into Bennu, as much as 19 inches. He is also confident that they grabbed more than a 100 grams.

They are therefore going to as quickly as possible store the samples in the Sample Return Capsule for return to Earth, beginning on October 27. They need to do a complex series of steps to make this happen, which is why it cannot happen until then.

One more detail: In their simulations prior to the touch-and-go, they had a range of estimates of how deep the spacecraft would penetrate. According to Lauretta, OSIRIS-REx plunged into Bennu at the softest part of that range, telling them that the asteroid is probably much more loosely packed than expected.

Because they are not doing that last engine burst means that they are moving away from Bennu for good. They will not return to the asteroid. Whether they will be able to get post sample grab images of Nightingale is unknown.

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Starship prototype #8 gets its nosecone

10:09 am

Starship prototype #8, with nosecone
Screen capture from LabPadre live stream.

Capitalism in space: SpaceX has now installed the nosecone on Starship prototype #8 in advance of its first vertical hop to 50,000 feet, or more than ten miles, expected sometime in November.

Curiously, hours prior to nose installation, SpaceX apparently removed one of Starship SN8’s three Raptor engines while also revealing that a spare fourth engine was already in Boca Chica. In other words, the prototype likely has only two Raptor engines installed at the moment, meaning that SpaceX will need to install another before the company can prepare for SN8’s next major test campaign.

According to CEO Elon Musk, the plan was to static fire Starship SN8’s three Raptor engines, perform final inspections and checkouts, perform another static fire, and finally attempt the first high-attitude Starship flight test. As of October 22nd, SpaceX has seemingly completed the two steps. Nosecone freshly installed, it’s likely that SpaceX will use the second triple-Raptor static fire opportunity to test the engines while feeding propellant solely from Starship’s liquid oxygen and methane header tanks – the latter of which is located in the nose.

The removal of one engine suggests they found something in that engine they didn’t like during last week’s static fire test, though that is mere speculation on my part.

The addition of the nosecone, with its own fins, clearly changes the appearance of prototype #8, making it look truly like a rocket ship. In fact, it looks more like the rocket ship imagined by science fiction writers for decades prior to the advent of spaceflight in the 1960s. The irony is that this is the first real rocket since the V2 in World War II to have this look.

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India’s Mars orbiter confirms global dust storms speeds atmosphere loss

9:54 am

India’s Mars orbiter Mission (MOM) has confirmed that the periodic Martian global dust storms act to accelerate the loss of the red planet’s atmosphere.

The U.S. orbiter MAVEN found the same thing during the 2018 global dust storm. Moreover, the two orbiters focused on observing different hemispheres (MOM in the morning and MAVEN in the evening), and bot got comparable results.

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Was there a catastrophic flood in Kasei Valles on Mars?

1:45 pm

Overview map of lower section of Kasei Valles

Figure from paper

In our on-going exploration of Mars using the amazing high resolutions being taken by Mars Reconnaissance Orbiter (MRO), we return today to Kasei Valles, the drainage valley coming down from Mars’ giant volcanoes that I featured only a few days ago. And like that post, we must begin from afar and zoom in to understand what we are seeing in the final cool image.

Kasei Valles is a canyon system is about 1,900 miles long, and would cover two-thirds of the continental United States if placed on Earth. Its north-trending upstream section to the west and south of the area shown on the overview map to the right is thought to have been formed by some combination of glacial and volcanic processes. The downstream west-east section shown in the map instead appears to have been formed by a sudden catastrophic flood, which some scientists have theorized [pdf] occurred when a three hundred long ice dam broke suddenly, releasing the flood quickly across this terrain to create its features. The second map to the right, from their paper, illustrates this hypothesized event.

The white box in 60-mile wide Sharonov Crater near the center of the first map above indicates the location of today’s cool image below. The 1976 landing site of VIking 1 about 420 miles to the east is also indicated.

If you look closely at the first overview map above you can see that the rim of Sharonov Crater appears breached in its southwest quadrant, just to the west of the white box. This breach is less a break and more an area of increased erosion. Regardless, it sure appears that a massive flow pushed through the rim here.
» Read more

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SpaceX wins partial approval to provide Starlink service in Canada

10:05 am

Capitalism in space: Though SpaceX has obtained permission to provide its Starlink internet service from Canada’s Radio-television and Telecommunications Commission, similar to the U.S.’s FCC, it still has not gotten full government approval to begin offering its service to customers.

It appears a different Canadian regulatory body, dubbed Innovation, Science and Economic Development Canada (ISED), has still not given its okay of the “satellite spectrum” SpaceX requires. From the second link:

SpaceQ had previously contacted ISED in June about SpaceX. ISED wouldn’t comment directly on any application, but did tell SpaceQ that the applications and approved website pages were up to date at that time. The website had last been updated in May. Since then, the website was updated in July. And yet there’s still no mention of SpaceX. It’s my understanding that the specific pages with applications and approvals is updated pretty quickly when there is new information to post. Though it took 3 weeks for changes to appear after Kepler submitted their application in June of this year.

With respect to how long it takes to get approval, ISED said the “service standard for the processing of satellite applications, including for those for foreign satellites, is 130 calendar days.” It’s quite possible that it could take longer.

This description carries all the hallmarks of a typical government bureaucracy whose only purpose is to block new companies and new technology. The political swamp of Canada might also be using it as a means of extortion for campaign funds from SpaceX. “Nice business you got there. Sure would be a shame if it didn’t get that license approval.”

I don’t think SpaceX needs to bow to these games. In the end ISED will back down and give approval, especially when the company begins offering its services just over the border in the U.S. The competitive and political pressure to give its okay will then be too great.

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Lockheed Martin to move its smallsat rocket launch project to the UK

9:49 am

Capitalism in space: Lockheed Martin announced today that it is moving its Pathfnder smallsat rocket operation to a new spaceport in Shetland in the United Kingdom, with the first launch targeted for ’24.

This Shetland site is a different UK spaceport than the Sutherland site, also in Scotland, where both Lockheed Martin and the British company Orbex also hope to launch.

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ISS crew returns safely to Earth in Soyuz

9:22 am

After a six month mission on ISS, three astronauts have safely landed on Earth in their Soyuz capsule.

Cassidy, Ivanishin and Vagner spent 196 days in orbit, having arrived at the station on April 9. They left behind NASA’s Kate Rubins and Roscosmos’ Sergey Ryzhikov and Sergey Kud-Sverchkov, who arrived at the orbiting outpost a week ago for a six-month stay.

Cassidy, returning from his third space mission, has now spent a total of 378 days in space, the fifth highest among U.S. astronauts.

While serving as the station’s commander, Cassidy welcomed SpaceX Demo-2 crew Robert Behnken and Douglas Hurley, the first NASA astronauts to launch to the space station on an American spacecraft from American soil since the retirement of the space shuttle fleet in 2011.

Cassidy and Behnken completed four spacewalks for a total of 23 hours and 37 minutes, becoming two of only four U.S. astronauts to complete 10 spacewalks.

The three astronauts still on board ISS now await the arrival of four astronauts on SpaceX’s Resilience capsule, scheduled for launch in early to mid-November. This will rise the crew on ISS to seven, which I think is the highest since the retirement of the shuttle in 2011.

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Images taken during OSIRIS-REx sample grab on Bennu

3:40 pm

Below is an embed of a short eight second video of OSIRIS-REx’s sample grab yesterday from the surface of Bennu, created from 82 images, and covering at high speed the five minutes of approach, contact, and retreat. If you set the speed rate at 0.25, you can get a better view of the whole sequence of events.

From the science team’s press release,

The spacecraft’s sampling arm – called the Touch-And-Go Sample Acquisition Mechanism (TAGSAM) – is visible in the lower part of the frame. The round head at the end of TAGSAM is the only part of OSIRIS-REx that contacted the surface during the sample collection event. In the middle of the image sequence, the sampling head positions itself to contact the asteroid’s surface head-on. Shortly after, the sampling head impacts site Nightingale and penetrates Bennu’s regolith. Upon initial contact, the TAGSAM head appears to crush some of the porous rocks underneath it. One second later, the spacecraft fires a nitrogen gas bottle, which mobilizes a substantial amount of the sample site’s material. Preliminary data show the spacecraft spent approximately 5 of the 6 seconds of contact collecting surface material, and the majority of sample collection occurred within the first 3 seconds.

The TAGSAM is designed to catch the agitated surface material, and the mission team will assess the amount of material collected through various spacecraft activities. After touchdown, the spacecraft fired its thrusters to back away from Bennu. As expected, this maneuver also disturbed the Nightingale site, and loose debris is visible near the end of the image sequence. Preliminary telemetry shows the spacecraft remains in good health. The spacecraft was traveling at 0.2 mph (10 cm/sec) when it contacted sample site Nightingale and then backed away at 0.9 mph (40 cm/sec). [emphasis mine]

At the moment it appears they don’t yet know how much sample they have gotten, but they are very optimistic that they have gotten enough, based on the performance above. On October 24th, when they have gotten far enough away from the asteroid, they give the spacecraft a spin to measure its present mass and compare that to a spin done prior to the sample grab. The difference will tell them how much sample they have captured.

They will also be looking at images of TAGSAM over the next few days, which will also indicate what’s been captured.

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Sample grab appears to be a success at Bennu

3:17 pm

OSIRIS-REx has apparently successfully touched the surface of Bennu, grabbed a sample, and backed away without damage.

The link takes you to my embed of NASA’s live stream, which is mostly pr garbage. However, it is providing live updates from the mission control team, as it happens. Most of time, the NASA people running their pr effort even have the sense to shut up when such updates come it.

Right now we do not know how much of a sample was obtained. It will take some analysis of data and images to find out. They will know by the time of tomorrow’s press conference at 5 pm (Eastern).

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Weird crater on Moon

11:43 am

Strange Ryder Crater on the Moon
Click for full image.

The photo to the right, released today by the science team of Lunar Reconnaissance Orbiter (LRO), takes a overhead view of the unusual crater dubbed Ryder (named after lunar scientist Graham Ryder).

The crater is located on the Moon’s far side, on the edge of the South Pole-Aitken Basin, the Moon’s largest and possibly oldest impact basin. What makes Ryder Crater intriguing is its strange shape, as well as its interior north-south interior ridge.

This crater was featured previously in 2012 in a spectacular oblique image looking east across the crater. Then, the scientists theorized its strange shape was caused by two factors, first that the impact was oblique, and second that it occurred on a steep slope.

Today’s release adds another factor that might explain the interior ridge. The context map below makes that explanation obvious.
» Read more

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Today’s OSIRIS-REx sample grab from Bennu

10:28 am

Nightingale landing site on Bennu
The Nightingale landing site on Bennu, with
OSIRIS-REx superimposed. Click for full image.

Spaceflight Now today published a nicely detailed article summarizing the entire OSIRIS-REx mission to the asteroid Bennu, in anticipation of today’s attempt to grab a sample from that asteroid’s surface.

If you want to understand what is happening today, this article does a nice job of outlining everything.

I have embedded the live stream of the sample grab below the fold. It begins at 5 pm (Eastern) today. Be warned that it will show very little of the actual event, as the spacecraft will not be sending much data back to Earth today, during these operations. All we will really find out is if the grab happened, or was aborted to avoid risks, or occurred but the spacecraft was impacted by flying material during the grab. (Let us hope that this last option does not occur.)

The first images and data will not arrive until tomorrow, to be released during a press conference scheduled for 5 pm (Eastern).
» Read more

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The face on Jupiter

9:56 am

The face on Jupiter!

Citizen scientist Gerald Eichstädt has created a two-image blink animation from Juno images of Jupiter that shows the changes in the two oppositely rotating storm vortices, shown on the right. As he notes.

Two vortices or eddies, one cyclonic, the other one anticyclonic, can propell themselves mutually and slowly within the overall context they are embedded in.

…The rotation of the two vortices is perceptible in the image sequence taken within nine minutes. The cyclonic eddy is located at the left, the anticyclonic one at the right. The motion of the vortex pair, however, is too slow to be resolved. But the morphology of the cloud tops points towards a relative upward motion in this rendition.

That the two storms also invoke face I am sure also had something to do with his decision to showcase this data. Unlike the face on Mars, this face is real, though relatively temporary. It will eventually break apart as Jupiter’s storms evolve.

The animation can be seen at the link.

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China outlines its updated space ambitions for the 2020s

9:38 am

The new colonial movement: China this week outlined some of its space ambitions for the 2020s, updating its planned lunar unmanned program as well as developments in its rocket industry.

For the Moon they plan the following:

Chang’e 6, a backup mission for this year’s sample-return launch, is scheduled to head to the moon in 2023 or 2024; Chang’e 7 is planned to launch around 2024 with the dual aims of landing on the south pole of the moon and closely studying the region from orbit. An eighth mission is also in the works for later this decade.

As for their rocket industry, CASIC, the government entity that supervises China’s commercial space activities (including a number of private companies operating independently but supervised closely by it) announced plans for a reusable two-stage reusable spaceplane, a new constellation of satellites, and a number of new quick-launch solid rockets aimed at doubling their launch rate.

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Leak on ISS still leaking even after being temporarily sealed with tape

9:27 am

Even though Russian astronauts have now patched with Kapton tape the 1-inch crack where they thought the leak in the Zvezda module on ISS was located, the loss of air has continued, and even increased.

The pressure in the Zvezda module of the International Space Station (ISS) keeps lowering, although the fissure was patched with Kapton tape, and even faster than before the fix, the crew told the ground control on Tuesday, as broadcast by NASA.

They are going to add more tape to the patch and see if this seals the leak.

Meanwhile, there has been little discussion about the nature of this 1-inch crack. Was it caused by a micrometeorite, or is it a stress fracture? And where exactly is it, and does that location help explain it?

Inquiring minds need to know!

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SpaceX completes static fire test on Starship prototype #8

9:09 am

Capitalism in space: SpaceX last night successfully completed the static fire test on its eighth Starship prototype, for the first time firing three Raptor engines simultanously.

Video of the test, cued to just before ignition, is embedded below the fold.

The company will now install the nosecone on the prototype, repeat this static fire test again in about a week, and then prepare it for its first flight, an expected 50,000 foot hop. I expect that hop to occur in early to mid-November, about the same time the next manned Dragon flight will occur.

» Read more

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The edge of Martian chaos

2:05 pm

Overview map of end of Kasei Valles

For today’s cool image, we are going to start from afar and zoom in, because I think that might be the best way to gain at least a rudimentary understanding of the strange geology visible at this one particular Martian location.

The first image, to the right, is the overview map. The red cross indicates our target, a chaotic canyon that flows into the larger Kasai Valles, one of Mars’ largest and longest canyons and possibly only exceeded in size by Valles Marineris. This part of Kasai is near its end, where it drains out into the vast northern lowland plains of Mars.

The second image, below, comes from the wide angle camera on Mars Reconnaissance Orbiter (MRO).
» Read more

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Russian astronauts repair oxygen regeneration unit

10:26 am

Russian astronauts on ISS have successfully repaired the oxygen regeneration unit on the Zvezda module.

From the TASS article was this additional information:

The Elektron-VM oxygen supply system developed by Russia’s Research and Design Institute of Chemical Machine-Building (NIIChimMash) has been operational aboard the space station since its creation. The system can generate from 25 to 160 liters of oxygen per hour and additionally from 50 to 320 liters of hydrogen per hour. In April 2010, it took the ISS crew several days to fix the broken system.

No word yet on any new information on the “fracture” that is causing the slow leak.

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SpaceX launches another 60 Starlink satellites

10:18 am

Capitalism in space: SpaceX today successfully launched another 60 Starlink satellites, raising the constellation to more than 800 satellites.

The first stage successfully landed, for the sixth time, on a drone ship. The company also recovered both fairings, which were making their third flight. With one fairing’s recovery however the net broke on the ship, which might have damaged it this time.

The leaders in the 2020 launch race:

26 China
17 SpaceX
11 Russia
4 ULA
4 Europe (Arianespace)

The U.S. had regained the lead over China, 27 to 26, in the national rankings.

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Another high altitude balloon company enters the space tourism market

3:30 pm

Capitalism in space: Another high altitude balloon company, this time from Spain, is now vying for the space tourism market.

EOS-X Space, a Spanish startup, wants to take 10,000 people to the frontier of space within the next 10 years. With EOS-X Space, the journeys won’t be in rockets or ultrasonic planes. They’ll instead take place in a pressurized capsule propelled by a balloon that will rise to an altitude of up to 40 kilometers, or nearly 25 miles.

This means space tourists won’t have to wear a suit for the duration of the trip, nor will they have to do any physical preparation. Depending on the weather, each trip is set to last four or five hours.

They are targeting the same market as the American company Space Perspectives, which hopes to begin flying tourists on its stratospheric balloon, dubbed Neptune, by ’24.

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Delta 4 Heavy launch now delayed indefinitely due to launchpad issues

3:16 pm

ULA has now delayed indefinitely the launch of a military reconnaissance satellite using its Delta 4 Heavy rocket because of ongoing issues in the swing arms on the launch tower.

According to ULA’s CEO, Tory Bruno:

..ULA was “working through an issue with pad hydraulics” associated with the swing arm retraction system at the Delta 4 launch pad. Three swing arms feeding propellants and conditioned air to the rocket and its satellite payload are designed to retract as the Delta 4-Heavy lifts off.

“Fixing is always easy,” Bruno tweeted. “Making sure something stays fixed takes more work and lots of discipline.”

This launch has been delayed numerous times in the past two months, almost always because of a variety of different problems, most related to the launchpad, with two scrubs occurring as launch aborts at launch. As the article at the link correctly notes,

The repeated problems with different parts of the Delta 4-Heavy’s launch pad have raised questions about aging infrastructure at pad 37B, which was originally built to support Saturn rocket launches in the 1960s, then mothballed until Boeing took over the facility in the 1990s for the Delta 4 program.

Boeing built the towering mobile gantry for the Delta 4 rocket, along with a then-new fixed umbilical tower with huge swing arms designed to pull away from the launcher as it climbs away from the pad.

The age of the launchpad, combined with the expensive complexity of the Delta 4 Heavy that results in very few launches spread over many years, cannot result in reliable operations.

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Chang’e-4 and Yutu-2 awake for 23rd lunar day on far side of the Moon

10:01 am

The new colonial movement: China’s Chang’e-4 lander and Yutu-2 rover have both been reactivated for their 23rd lunar day on far side of the Moon.

Yutu 2 is set to continue its journey northwest from the landing site and will target a roughly 12-inch (30 centimeters) rock on the rim of a nearby crater for analysis with a spectrometer. The rover has used that instrument to analyze a range of specimens in Von Kármán crater, notably causing a stir when it discovered an impact melt breccia initially described as “gel-like.”

It is the hope of the Chinese scientists that this rock will be ejected material from that crater and will have come from the lunar interior.

Also, though you need to read Chinese to understand how to access it, the project has released to the public another batch of data from both spacecraft.

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ArianeGroup completes testing of all three Ariane 6 rocket engines

9:54 am

Capitalism in space: ArianeGroup, the joint private partnership that is building Europe’s new Ariane 6 rocket, has successfully completed all testing of the three different engines the rocket will use.

The first stage has a core engine with side strap-on solid rocket motors, while the upper stage has a different engine entirely. All three have now passed qualification tests, allowing full design and construction of the rocket itself.

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Old launch tower burns down at Firefliy launchpad at Vandenberg

9:47 am

Capitalism in space: Apparently workers dismantling the old launch tower at Firefliy’s new launchpad at Vandenberg started a fire that burned the tower down.

A photo showing the former Delta II rocket’s Space Launch Complex-2 facility with flames and a huge column of black smoke rising from the distinctive blue tower began circulating on social media sites on Thursday night.

The launch site, most recently used for liftoffs of United Launch Alliance’s Delta II rockets, has been handed over to Texas-based Firefly Aerospace, which is developing a new family of rockets as an economical way to carry small- to medium-sized satellites into space.

The firm has a long-term lease to use the site with hopes of saving money by using some of the existing facilities. Firefly has plans to dismantle the historic tower, and a contractor armed with welding equipment reportedly sparked the blaze Thursday.

No word yet on whether this fire will delay Firefly’s planned first launch in the spring.

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Leak on ISS traced to “fracture”

9:43 am

Not good news: According the Russian news source TASS, Russian astronauts have pinpointed the location of the slow leak on ISS to ” a fracture in the intersection compartment of the Russian Zvezda module.”

The astronaut also called it a “scratch,” which means the fracture is not yet confirmed. They will do more testing to find out if this is the leak source in the coming days.

If it is a fracture, the ramifications could be very serious. It appears the “intersection compartment” is the area where the aft docking port is located, which is also the area where many Progress freighters have docked in the twenty years since Zvezda was launched. Thus, this could be a stress fracture that can only get bigger with time. Its location might also preclude further dockings at this port, limiting arrivals of future Progress cargo ships.

Fun fact: They pinpointed this location using a floating tea bag.

The tea bag’s sway in zero gravity conditions towards the air leak overboard the space station was registered by cameras, the cosmonaut said. “We believe that we have really identified the probable leakage area. We have distributed a tea bag [in the Zvezda module] before closing the transfer chamber,” Ivanishin said.

The tea bag’s movement was recorded, the Russian cosmonaut said.

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Update on InSight’s mole: It is now underground

9:29 am

InSight's mole now completely buried
Click for full image.

An update today on the mole digging tool on the Mars lander InSight has revealed that the mole appears to finally be completely buried, though it remains unclear whether its most recent digging effort had succeeded in digging downward.

We found that during the first two rounds of hammering and during the first half of the third round of hammering, the scoop went further into the sand. Since the Mole was hidden under the scoop, the penetration of the probe itself could not be observed directly.

During the hammering, the flat tether running to the probe moved considerably, but these could only be clearly identified as forward movements during the hammering on 22 August. Overall, we could estimate from the movements of the scoop that the Mole moved at most one centimetre further into the ground. It was interesting to observe that during the second half of the round of 250 hammer blows on 19 September, the scoop did not go any further, probably because it encountered duricrust. This was certainly a desired outcome, as it allowed a second Free Mole Test to be conducted. In fact, the probe continued to move according to the movements of the tether, but it could not be clearly determined that these movements brought the Mole deeper into the ground.

The image shows InSight’s arm above the filled hole, with the mole’s flat tether coming out of the ground.

They are now going to fill the hole more, and then press down with the scoop during later drilling efforts to see if this allows the mole to proceed downward. If it fails I’m not sure if there is anything else they will be able to do to get the mole to work.

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Threatened collision between two big pieces of space junk does not happen

9:11 am

Follow-up observations of the two big pieces of space junk, a Soviet-era defunct satellite and a Chinese upper stage, that had a high chance of colliding yesterday has confirmed that no collision occurred.

Shortly after the time of probable collision, the CZ-4C stage passed over the Kiwi Space radar tracking station in New Zealand. According to LeoLabs, “Shortly after [time of probable collision], we will have a direct pass of CZ-4C R/B over our Kiwi Space Radar in New Zealand. We have scheduled a search mode scan during this time to ensure we only see two objects as expected and hopefully confirm that no new debris is detected.”

This is exactly what happened, with the only observed object being the single CZ-4C stage — indicating no collision had occurred.

It is fortunate nothing happened. Though the collision point was about 360 miles higher than the orbit of ISS, the debris from a collision would have been flung in all directions, some of which might have crossed the space station’s path.

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