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First images from Chandrayaan-2

October 9, 2019 at 8:45 am Robert Zimmerman Points of Information

Click for the full image.

India has released the first image from the high resolution camera on its Chandrayaan-2 lunar orbiter.

The image on the right, cropped to post here, is from that image and shows objects as small as 10 inches across, which is better than the 20 inch resolution obtained by the U.S.’s Lunar Reconnaissance Orbiter (LRO). Depending on orbit, they should therefore eventually be able to image their crashed Vikram lander with more detail. It also means they can supplement and improve on data from LRO, a significant achievement for India.

Additionally they report that all instruments on board are functioning normally.

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LRO scientists release image of Vikram landing site

September 27, 2019 at 10:28 am Robert Zimmerman Points of Information

Click for full image.

The Lunar Reconnaissance Orbiter (LRO) science team yesterday released their high resolution image taken of the area where it is believed India’s lunar lander Vikram crashed.

The image to the right is not that image, but an oblique overview showing where that landing region is, the center of which is indicated by the white cross. Vikram was aiming for this flat region between the Simpelius N and Manzinus C craters.

In releasing the image, the scientists explained what they thought were the reasons they have so far failed to find Vikram.

We note that it was dusk when the landing area was imaged and thus large shadows covered much of the terrain, perhaps the Vikram lander is hiding in a shadow. The lighting will be favorable when LRO passes over the site in October and LROC will attempt to image the lander at that time.

You can explore the actual image at the link. It is quite large, though their viewer there allows you to zoom in and move about, inspecting each grid area very closely. As they note, there are a lot of shadowed areas.

LRO’s high resolution camera can see objects as small as Vikram, even if broke up somewhat on landing. The key for discovery will be timing. LRO will have to pass over at a time when the lander is not in shadow.

UPDATE: Below the fold is a side-by-side comparison of this region, with mid-day on the left and the dusk LRO image on the right, created by Rex Ridenoure of Ecliptic Enterprises.and graciously provided to me.
» Read more

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LRO fails to spot Vikram on Moon

September 19, 2019 at 9:32 am Robert Zimmerman Points of Information

Despite successfully taking high resolution images of the area on the Moon where it is thought India’s Vikram crash-landed two weeks ago, the Lunar Reconnaissance Orbiter (LRO) science team has been unable to identify it in those images.

LRO’s Lunar Reconnaissance Orbiter Camera instrument, or LROC, imaged the intended south pole touchdown site for the lander, which is called Vikram, as planned yesterday (Sept. 17), Aviation Week’s Mark Carreau reported. But “long shadows in the area may be obscuring the silent lunar explorer,” Carreau wrote.

“It was near dusk as the region prepares to transition from a two-week lunar day to an equally long lunar night, so shadows covered much of the region, and Vikram may not be in the LROC’s field of view,” Carreau wrote, citing a NASA statement.

This means that they will simply have to try again during a later orbit. Eventually the lighting conditions will be right, and LRO will photograph Vikram.

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LRO to image Vikram landing site next week

September 13, 2019 at 10:16 am Robert Zimmerman Points of Information

The Lunar Reconnaissance Orbiter (LRO) science team plans to take high resolution images of the Vikram landing site when the orbiter flies over that site on September 17, thus allowing them to release before and after images.

Noah Petro, LRO’s project scientist at NASA’s Goddard Space Flight Center, said that the orbiter is due to fly over the Vikram landing site Tuesday, Sept. 17. “Per NASA policy, all LRO data are publicly available,” Petro wrote in an email. “NASA will share any before and after flyover imagery of the area around the targeted Chandrayaan 2 Vikram lander landing site to support analysis by the Indian Space Research Organization.”

Officials with India’s space agency ISRO have said they have photographed Vikram with their orbiter, Chandrayaan-2, but they have not released these images as yet. Their have also been reports from India stating that their images suggest the lander is still in one piece, but these reports are not confirmed.

LRO’s images should clarify the situation. The images should also help tell us what exactly happened after Indian engineers lost contact with Vikram shortly before landing.

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Chandrayaan-2 locates Vikram

September 9, 2019 at 8:28 am Robert Zimmerman Points of Information

According to K. Sivan, the head of ISRO, India’s space agency, their Chandrayaan-2 orbiter has captured a thermal image of Vikram on the lunar surface, pinpointing the lander’s location.

They have not released the image. According to reports today, they do not yet know the lander’s condition, and have not regained communications. Reports late yesterday had quoted K.Sivan as saying “It must have been a hard-landing.” That quote is not in today’s reports.

In watching the landing and the subsequent reports out of India, it appears that India is having trouble dealing with this failure. To give the worst example, I watched a television anchor fantasize, twenty minutes after contact had been lost, that the lander must merely be hovering above the surface looking for a nice place to land. Most of the reports are not as bad, but all seem to want to minimize the failure, to an extreme extent.

Their grief is understandable, because their hopes were so high. At the same time, you can’t succeed in this kind of challenging endeavor without an uncompromising intellectual honesty, which means you admit failure as quickly as possible, look hard at the failure to figure out why it happened, and then fix the problem. If India can get to that place it will be a sign that they are maturing as a nation. At the moment it appears they are not quite there.

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Vikram fails to land on Moon

September 6, 2019 at 1:26 pm Robert Zimmerman Points of Information

Vikram, India’s first attempt to soft land on the Moon, apparently has failed, with something apparently going wrong in the very last seconds before landing.

As I write this they have not officially announced anything, but the live feed shows a room of very unhappy people.

It is possible the lander made it and has not yet sent back word, but such a confirmation should not take this long.

India’s prime minister, Narendra Modi, was given a very short briefing by K. Sivan, head of ISRO, and then apparently left without comment. This I found an interesting contrast to the actions of Israel’s prime minister Benjamin Netanyahu when its lunar lander Beresheet failed in landing earlier this year. Netanyahu came out to comfort the workers in mission control, congratulating them for getting as far as they had. ~~Modi apparently simply left.~~ UPDATE: Modi has reappeared to talk to the children who had won a contest to see the landing as well as people in mission control. After making a public statement he has now left.

They are now confirming that communications was lost at 2.1 kilometers altitude, which was just before landing. They are analyzing the data right now to figure out what went wrong.

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Watch Vikram landing on Moon

September 6, 2019 at 10:55 am Robert Zimmerman Points of Information

Vikram's primary landing site

The new colonial movement: I have embedded below the live stream of India’s attempt today to land its Vikram lander on the Moon, broadcast by one of their national television networks.

The landing window is from 4:30 to 5:30 pm Eastern. This live stream is set to begin about 3 pm Eastern.

If you want to watch ISRO’s official live stream you can access it here.

Some interesting details: Vikram is named after Vikram A. Sarabhai, who many consider the founder of India’s space program. The lunar rover that will roll off of Vikram once landing is achieved is dubbed Pragyan, which means “wisdom” in Sanskrit. Both are designed to operate on the Moon for one lunar day.

The landing site will be about 375 miles from the south pole.

That spot is a highland that rises between two craters dubbed Manzinus C and Simpelius N. On a grid of the moon’s surface, it would fall at 70.9 degrees south latitude and 22.7 degrees east longitude.

The white cross on the image to the right is where I think this site is. The secondary landing site is indicated by the red cross.

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Vikram makes second and last lunar orbital change

September 4, 2019 at 9:40 am Robert Zimmerman Points of Information

The new colonial movement: India’s Vikram lunar lander today made its second and last orbital change, preparing itself for landing on the Moon on September 7.

The orbit of Vikram Lander is 35 km x 101 km. Chandrayaan-2 Orbiter continues to orbit the Moon in an orbit of 96 km x 125 km and both the Orbiter and Lander are healthy.

With this maneuver the required orbit for the Vikram Lander to commence it descent towards the surface of the Moon is achieved. The Lander is scheduled to powered descent between 0100 – 0200 hrs IST on September 07, 2019, which is then followed by touch down of Lander between 0130 – 0230 hrs IST

They plan to roll the rover Pragyan off of Vikram about two hours after landing.

This article provides a nice overview of the mission.

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Vikram completes first de-orbit burn

September 2, 2019 at 9:45 pm Robert Zimmerman Points of Information

The new colonial movement: India’s Vikram lunar lander has successfully completed its first de-orbit engine burn, lasting 4 seconds, adjusting its orbit slightly in preparation for landing on the Moon on September 7.

They will do a second burn tomorrow, further adjusting the orbit.

Note that the update says that this burn was by Chandrayaan-2, but this must be a mistake. The Vikram lander separated from the Chandrayaan-2 orbiter yesterday, and it is Vikram that is doing the orbital changes and will land on the Moon.

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Vikram has successfully separated from Chandrayaan-2

September 2, 2019 at 9:11 am Robert Zimmerman Points of Information

The new colonial movement: India’s lunar lander, Vikram, has successfully separated from Chandrayaan-2, and is functioning nominally in lunar orbit.

The update describing this is the second update at the link, with the first detailing the arrangements for the press to cover the landing on September 7.

The lander carries the rover, dubbed Pragyan, which will roll off Vikram only a few hours after landing.

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Chandrayaan-2 now in proper lunar orbit for release of lander/rover

September 1, 2019 at 7:45 pm Robert Zimmerman Points of Information

India’s Chandrayaan-2 spacecraft today completed its fifth engine burn in lunar orbit, placing it in the correct orbit for releasing its lander/rover.

The next operation is the separation of Vikram Lander from Chandrayaan-2 Orbiter, which is scheduled on September 02, 2019, between 1245 – 1345 hrs (IST). Following this, there will be two deorbit maneuvers of Vikram Lander to prepare for its landing in the south polar region of the moon.

The landing itself is scheduled for September 7.

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Chandrayaan-2 lowers lunar orbit for the 4th time

August 30, 2019 at 8:56 am Robert Zimmerman Points of Information

The new colonial movement: India’s orbiter/lander/rover Chandrayaan-2 today successfully lowered its lunar orbit for the 4th time, dropping it to 77 by 102 miles.

The next engine burn is for tomorrow, and should be followed by almost daily burns from here on out, until they reach the required orbit for sending the lander/rover to the surface on September 7.

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Chandrayaan-2 lowers lunar orbit again

August 28, 2019 at 8:30 am Robert Zimmerman Points of Information

Chandrayaan-2 has successfully made its third lunar orbit engine burn, lowering its orbit to 179 x 1412 kilometers.

They are aiming for a 100 kilometer orbit. Once they reach that, the lander/rover will separate from the orbiter to begin its descent to the surface, on September 7.

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More images from Chandrayaan-2

August 26, 2019 at 9:13 am Robert Zimmerman Points of Information

Click for full image.

The Chandrayaan-2 engineering team has released more lunar images from Chandrayaan-2, this time from its higher resolution Terrain Mapping Camera 2.

One example is to the right, reduced to post here. It was taken from about 2,700 miles altitude, and shows a section of the northern hemisphere on the Moon’s heavily cratered far side. There are other images at the link.

The goal of these images is to demonstrate that the camera and spacecraft pointing systems are working. It appears they have done so successfully.

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ISRO releases Chandrayaan-2’s first Moon image from lunar orbit

August 22, 2019 at 9:22 am Robert Zimmerman Points of Information

The Moon as seen by Chandrayaan-2

India’s space agency ISRO has released the first image taken by Chandrayaan-2 after entering orbit around the Moon.

That image is to the right, reduced to post here. It was taken from about 1,600 miles elevation, and shows mostly the far side of the Moon. The dark mare in the upper right is the Sea of Moscow, which is the only large mare on the far side.

This image once again proves the camera and the spacecraft’s ability to point it accurately are both functioning.

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Chandrayaan-2 completes first lunar orbit adjustment

August 21, 2019 at 9:00 am Robert Zimmerman Points of Information

Chandrayaan-2 today made its first engine burn while in lunar orbit, reducing the orbit’s apolune (its high point) down to 4,412 kilometers from 18,072 kilometers.

Three more orbital adjustments to go before they enter the required orbit for landing.

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Chandrayaan-2 successfully enters lunar orbit

August 20, 2019 at 8:42 am Robert Zimmerman Points of Information

The head of ISRO today announced that, after completed a 29 minute engine burn, India’s Chandrayaan-2 orbiter/lander/rover has successfully entered the correct orbit around the Moon.

In his briefing, Dr. Sivan announced that “The LOI maneuver was performed successfully today morning using the onboard propulsion system for a firing duration of about 29 minutes. This maneuver precisely injected Chandrayaan-2 into an orbit around the Moon.” He emphasised the unique requirement of 90 degree orbital inclination of Chandrayaan-2 and said that it was achieved by the precise execution of both the Trans Lunar Injection (performed on August 14, 2019) and today’s LOI maneuver.

“The satellite is currently located in a lunar orbit with a distance of about 114 km at perilune (nearest point to the Moon) and 18,072 km at apolune (farthest point to the Moon)”, he added.

Over the next four lunar orbits they will execute four more engine burns to lower the spacecraft to the orbit needed to send the lander/rover to the surface on September 7 in the south polar region of the Moon between the craters Manzinus C and Simpelius N at about 71 degrees latitude.

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Chandrayaan-2 successfully puts itself in route to the Moon

August 14, 2019 at 8:46 am Robert Zimmerman Points of Information

Chandrayaan-2 today successfully completed its last Earth perigee burn, raising its orbital apogee so that it will enter the Moon’s gravitational sphere of influence on August 20th.

Chandrayaan-2 will approach Moon on August 20, 2019 and the spacecraft’s liquid engine will be fired again to insert the spacecraft into a lunar orbit. Following this, there will be further four orbit maneuvers to make the spacecraft enter into its final orbit passing over the lunar poles at a distance of about 100 km from the Moon’s surface.

…Subsequently, Vikram lander will separate from the orbiter on September 02, 2019. Two orbit maneuvers will be performed on the lander before the initiation of powered descent to make a soft landing on the lunar surface on September 07, 2019.

Vikram will be doing the hardest part, the landing.

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India’s new smallsat rocket gets its first launch contract

August 7, 2019 at 10:48 am Robert Zimmerman Points of Information

The new colonial movement: India today signed its first customer for its new and still untested SSLV rocket, designed to provide orbital launch services for the burgeoning smallsat market.

Spaceflight announced Aug. 6 that it will purchase the first commercial launch a new Indian vehicle scheduled to make its debut later this year. Spaceflight said it will launch payloads for an undisclosed U.S. satellite constellation customer on a flight of the Small Satellite Launch Vehicle (SSLV), a derivative of the existing, larger Polar Satellite Launch Vehicle (PSLV). The launch is scheduled for later this year and will be the second for the SSLV after a demonstration launch expected no earlier than September.

While the companies didn’t announce the customer for the mission, a July 25 filing with the Federal Communications Commission by Earth imaging company BlackSky Global sought a license for four of its satellites it said would launch on the SSLV in November 2019. The applications said the satellites would be deployed into two orbital planes, consistent with Spaceflight’s announcement.

While this Indian rocket is hardly a private operation, it has no military component, as do the new Chinese smallsat companies. ISRO, India’s space agency, is wholly civilian with no apparent ties to its military, as far as I know. Its goal is to purely make money and grab market share.

At the same time, the use of government funds to develop this rocket gives India the same advantage that China’s smallsat companies have over the privately funded rockets from the U.S. It allows them to set lower prices and undercut the competition.

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Chandrayaan-2 completes fifth orbital maneuver

August 7, 2019 at 10:40 am Robert Zimmerman Points of Information

Chandrayaan-2 has completed its fifth engine burn, raising the apogee of its Earth orbit to 142,975 kilometers.

The next engine burn, on August 14, will raise that apogee enough for the spacecraft to enter the Moon’s gravitational sphere of influence, when they will then transfer into lunar orbit.

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First images from Chandrayaan-2

August 5, 2019 at 8:29 am Robert Zimmerman Points of Information

Earth from Chandrayaan-2

India yesterday released the first images taken by its lunar orbiter/lander/rover Chandrayaan-2, taken from Earth orbit of the Earth.

The image on the right is one example, and was taken mostly for engineering purposes. All the images (available here) demonstrates that the spacecraft’s camera is working properly, and it can orient itself accurately.

They now hope to put the spacecraft into lunar orbit on August 20th, with the landing attempt set for September 7th, after they have lowered that lunar orbit sufficiently.

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Chandrayaan-2 successfully completes 4th orbit burn

August 2, 2019 at 9:23 am Robert Zimmerman Points of Information

The new colonial movement: India’s lunar orbiter/lander/rover Chandrayaan-2 today successfully completed its fourth engine burn, this time raising its orbital apogee to 89,472 kilometers (55,595 miles).

The next burn is scheduled for August 6, when the spacecraft’s orbit brings it back down to its perigee.

By September they expect to raise that apogee high enough so that it is within the Moon’s gravitational sphere of influence, when they will be able to put it the spacecraft into lunar orbit.

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Chandrayaan-2 completes third orbit maneuver

July 30, 2019 at 9:14 am Robert Zimmerman Points of Information

Chandrayaan-2 has completed its third engine burn to raise the apogee of its orbit to 71K.

The next burn is set for August 2, when the spacecraft returns to its orbital low point, the perigee. As it raises its orbit each time the time between burns gets extended because the orbit gets longer. By September however the apogee will put the spacecraft in the Moon’s gravitational field of influence, and when Chandrayaan-2 reaches that apogee engineers will then fire its engines again to slow it down and enter lunar orbit.

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Chandrayaan-2 raises its orbit a second time

July 26, 2019 at 8:22 am Robert Zimmerman Points of Information

India’s lunar orbiter/lander/rover Chandrayaan-2 today made its second orbital engine burn, raising the apogee of its orbit to almost 55K kilometers.

They have two more engine burns planned before the apogee enters the Moon’s sphere of influence and shifts the spacecraft’s orbit to a lunar one.

Link fixed!

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Chandayaan-2 completes first orbit burn

July 25, 2019 at 8:18 am Robert Zimmerman Points of Information

India’s lunar orbiter/lander/rover Chandrayaan-2 yesterday completed its first orbital engine burn, raising its apogee, the high point in its orbit, 6,000 kilometers to about 51,000.

This boost meant that Isro scientists have to perform one less manoeuvre in the Earth orbit than what was planned earlier. According to the path chalked out for Chandrayaan-2 before the launch, the on-board propulsion systems were to be fired six times in Earth orbit – five times to raise the apogee and once to raise the perigee. Now, only four more “burns”, or firing of the propulsion system, will be needed on July 26 and 29, and August 2 and 6, to reach the final orbit of 233.2 x 143,953km.

…With a final boost on On August 14, Chandrayaan-2 will escape Earth’s orbit and begin its seven-day journey towards the moon. The spacecraft is scheduled to reach the moon orbit on August 20.

Once in lunar orbit they plan four more burns to lower the spacecraft to a 100 kilometer circular orbit, where the lander/rover will release and begin their own lowering process aimed for a September 7 landing.

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India successfully launches Chandrayaan-2

July 22, 2019 at 8:24 am Robert Zimmerman Points of Information

The new colonial movement: India yesterday successfully launched its lunar orbiter/lander/rover Chandrayaan-2 into orbit.

India’s Geosynchronous Satellite Launch Vehicle GSLV MkIII-M1, successfully launched the 3840 kg Chandrayaan-2 spacecraft into an earth orbit today (July 22, 2019). The spacecraft is now revolving round the earth with a perigee (nearest point to Earth) of 169.7 km and an apogee (farthest point to Earth) of 45,475 km. Today’s flight marks the first operational flight of the GSLV Mk III.

They will slowly raise the spacecraft’s apogee over the next two months to bring it into the Moon’s gravitational sphere of influence, when they will begin lowering the orbit leading to a separation of the lander/rover for a September 7 landing near the Moon’s south pole.

This was the third launch of the upgraded GSLV Mark III. With this launch India now has an operational rocket it can use to launch its astronauts into space in 2022.

The leaders in the 2019 launch race:

9 China
9 Russia
8 SpaceX
5 Europe (Arianespace)
4 India

The U.S. continues to lead in the national rankings, 14 to 9.

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India reschedules Chandrayaan-2 launch

July 18, 2019 at 8:36 am Robert Zimmerman Points of Information

The new colonial movement: India’s space agency ISRO have rescheduled the launch of Chandrayaan-2 lunar orbiter/lander/rover now for July 22, 2019.

The new launch date apparently requires a very short launch window.

July 15 had offered the most comfortable launch window of 10 minutes for the Mission. But Isro has managed to successfully launch several satellites within one-minute windows in the past. However, delaying beyond July 31 could have potentially reduced the Orbiter’s life around the Moon.

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Chandrayaan-2 launch scrub caused by leak in helium bottle

July 16, 2019 at 8:50 am Robert Zimmerman Points of Information

Engineers today announced that the July 14 scrub of India’s Chandrayaan-2 lunar orbiter/lander/rover was caused by a leak in a helium bottle in the GSLV rocket.

“The good news is that we can fix the leak without dismantling the rocket, since there is an access door to the gas bottle which is atop the oxygen tank,” a senior scientist told TOI. “The bad news is that unless we ascertain the reason for the leak, there is a probability of the problem recurring.” Not having to dismantle means Chandrayaan-2 may be able to fly before the end of the July launch window, but a final failure analysis will be available only in a day or two.

Sources told TOI that the leak wasn’t serious enough to impair the flight, but Isro decided to apply “abundant caution,” given the importance of the Rs 978-crore project that would make India only the fourth country – after the US, Russia and China – to land a craft on the lunar surface.

I am willing to bet that if their investigation does not pinpoint the cause of the leak in the next few days, they will stand down from the July launch window. This mission, as well as proving the reliability of their GSLV rocket, are both too important to risk on an unknown and unsolved engineering issue.

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Chandrayaan-2 launch scrubbed

July 14, 2019 at 8:05 pm Robert Zimmerman Points of Information

The launch of India’s Chandrayaan-2 lunar orbiter/lander/rover today was scrubbed slightly less than an hour before launch because of “a technical snag.”

No new launch date has yet been announced. Nor have they as yet described what the issue was that caused this scrub.

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India hires Russia to train its astronauts

July 2, 2019 at 8:51 am Robert Zimmerman Points of Information

The new colonial movement: India’s space agency ISRO has hired the Russians to train its astronauts for its first home-built manned mission, Gaganyaan, presently scheduled to fly in 2022.

This decision makes a lot of sense. First, the space programs of Russia and India have cooperated a lot in the past, with Russia launch India’s first astronaut on a Soyuz in 1984. Second, Russia has a great deal of experience training new astronauts from other countries, including tourists. Third, neither of the other countries with manned programs, the U.S. and China, have established systems for this kind of training. China has never training any outsiders, and NASA’s systems for this are not designed for efficiency. Moreover, it has been eight years since the U.S. put anyone in space. If I was India I would prefer using someone with recent experience.

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