Questions tagged [soyuz-spacecraft]

Questions regarding the Soyuz manned spacecraft used by the Soviet and Russian space program.

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3
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1answer
96 views

How do Russians enumerate old Soviet space missions?

How are old Soviet space missions numbered in Russia? Were the earliest missions actually given a number, or are they referred to by their cosmonaut, or by a spacecraft nickname instead? Does the ...
19
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2answers
2k views

Why do Soyuz landings seem to be overshot?

Soyuz descent module re-entry flight is piloted (one of two modes AUS/computer or RUS/manual), using 8 thrusters, toward the Kazakhstan landing site. The ballistic re-entry occurs only when the other ...
9
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1answer
256 views

How close to a building has a Soyuz landed?

Soyuz capsules are designed to land onto land. To avoid the small chance of harming people or property, they are usually targeted to land in remote parts of Kazakhstan. However, some landings aren't ...
-2
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1answer
108 views

Why are the Soyuz and Progress spacecrafts about as expensive as the Soyuz rocket?

I have found this text: "In billion rubles: For Progress (without the cost of ~2.8 tonnes of cargo): Rocket: ~1.25 (Soyuz 2.1a) = 20.83 mil dollars Ship: ~0.9 (Progress MS) = 15 mil dollars ...
4
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2answers
111 views

Do non-American space travellers train on Dragon capsule as well?

Soyuz is a spacecraft which still uses technologies from soviet era. The Dragon capsule is state of the art with its electronic upgrades. With Russia and US sharing the International Space Station ...
3
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0answers
38 views

Soyuz parachute cord/rope forces

I'm wondering about the forces (e.g., how much pressure is being applied, how much pulling force, etc.) experienced by the ropes of the Soyuz parachutes when they are deployed. Many thanks!
5
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124 views

Will Soyuz spacecraft be able to visit the Lunar Gateway?

I mean launch from Earth, dock to the gateway and come back.
6
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1answer
85 views

Are there any differences in docking procedures between ISS and manned capsules vs. unmanned capsules?

The Russian Soyuz has an extensive history in docking with ISS with both manned and unmanned capsules. SpaceX just recently demonstrated manned-capsule docking with ISS with a history of unmanned ...
2
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1answer
88 views

Why were there two Soyuz 39?

Why were there two Soyuz missions numbered 39? There was Soyuz 7K-T No.39 in 1975, and Soyuz 39 in 1981. Questions about similarly confusing numbering by NASA: Why did Apollo mission numbering skip ...
6
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1answer
138 views

Why does the ISS occasionally operate with just 3 crew members?

There have many instances where the ISS only has 3 crew members, often for many weeks. This places significant strain on workload and productivity. Why isn't a new crew launched quicker?
10
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3answers
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Why doesn't Roscosmos launch Soyuz spacecraft with only Russians on board?

Just very curious. There are three seats in the Russian Soyuz spacecraft, and sometimes just one astronaut of the three is a Russian and the other two are either one American and someone from yet ...
11
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2answers
696 views

How do items from the Russian and Soviet space programs end up in private collections?

A member today posted this photo showing a complete instrument panel from a Soyuz TM capsule, and a globus instrument from a Voskhod capsule: Both items are in their private collection. Only 5 ...
23
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2answers
7k views

What happens to Soyuz reentry capsules after landing?

What happens to Soyuz reentry capsules after landing? I guess some must go to museums, but quite a lot of them have returned now. Is there any indication of where and how they are stored?
4
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1answer
116 views

How did the atmospheres of Soyuz, Shuttle, Mir, and ISS compare?

Soyuz and the Space Shuttle each docked with Mir and the International Space Station. When docked, the crew vehicle and station each share a common atmosphere for the crew to breathe. However, how ...
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0answers
83 views

What are these two items sticking out of Soyuz capsule MS-13 with returning Expedition 61 Crew? [duplicate]

At 18:55and 19:00 in NASA Videos' NASA Television Video File- MS 13 Hatch Closing Undocking Landing - February 6, 2020 what ...
6
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2answers
302 views

How much of the printed materials (manuals, instructions etc.) were allocated for the crew's use in Space Shuttles?

Whilst watching youtube video of an occasional Soyuz spacecraft launch (Soyuz ТМА-19М in this case), I've noticed (at 8:07) this large bundle of books. Another video of TMA-16M flight at 39:40 shows ...
22
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2answers
7k views

Why were Space Shuttle astronauts able to walk off the orbiter?

I am watching loads of ISS related videos and there is one detail I recently noticed; At the time, when Space Shuttles were still in operation and visiting ISS, when astronauts returned home, they ...
16
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1answer
879 views

Does the Soyuz spacecraft chemically stabilize its hydrogen peroxide (H₂O₂) to remain ISS-dockable for 200+ days?

Hydrogen peroxide (H2O2) from the local shop (dilute, 2-3%) sometimes has a stabilizer to slow its breakdown rate and increase its "shelf-life", since we'd like to keep it around the house on our ...
8
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4answers
348 views

Why is Soyuz's third stage's engine cutoff the most intense?

Based on the motion and reaction of the cosmonauts, the 3rd stage engine cutoff (cued video) at about T+ 08:46 in this video of a Soyuz ascent causes greater ...
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2answers
112 views

What are these Soyuz Astronauts/Cosmonauts holding in their hands before launch? [duplicate]

What are these Soyuz Astronauts/Cosmonauts holding in their left hands before launch? I suspect it must be the pump for the active cooling system by pumping water similar to those in EVA suits, but it ...
2
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3answers
501 views

Why are these Soyuz Astronauts/Cosmonauts wearing sun glasses and a blanket after landing?

Why are these Soyuz Astronauts/Cosmonauts wearing sunglasses? Is there any scientific reason for this? (Please don't say they want to look cool) I have not seen Shuttle Astronauts wearing sunglasses ...
5
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0answers
237 views

Why will Russia start arming cosmonauts again?

The Phys.org article Russia to give cosmonauts guns to fend off animals on landing says: Cosmonauts have been unarmed for more than a decade but Roscosmos agency head Dmitry Rogozin said it was time ...
4
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1answer
179 views

Tracking the Soyuz MS-15 approaching the ISS with binoculars

Next Wednesday, September 25th, the Soyuz MS-15 will be launched from the Baikonur cosmodrome. I guess the trip to the ISS will be long (6 hrs to 24 hr) as usual. I want to see both the ISS and the ...
12
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1answer
2k views

Has USSR/Russia launched humans on any rocket not derived from R-7?

The Soviet Union's first crewed launch, Vostok 1, was on a Vostok booster, derived from the R-7 ICBM and Sputnik satellite launcher with an additional stage added. The Soyuz boosters used today by ...
5
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1answer
440 views

What are those big valves on Soyuz control panel for?

What function do the two large, chunky red valves on the center of the Soyuz control panel have? They are located in the lower middle of this image, just above the Vizor periscope. I wish to know ...
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2k views

Microgravity indicators

As mentioned in the YouTube clip below and in the image, in the Soyuz craft hangs small toys or dolls as microgravity indicators. Is this really the purpose of the dolls being hung? Are people not ...
2
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0answers
55 views

Soyuz reentry acceleration profile with timing

I am looking for reentry Soyuz acceleration profile with timing. I was able to find graphs for ascent, but failed to find anything related with descent. The only thing I've got is Andreas Mogensen ...
13
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1answer
591 views

How many people have returned to Earth in a different type of vehicle than the one that launched them into space?

Recently we had the 15 year anniversary of Expedition 1 of the ISS. That particular crew launched in a Soyuz (TM-31) and returned on a Space Shuttle (Discovery, STS-102), which I found a remarkable ...
3
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1answer
113 views

Why did the Soyuz 7K-LOK use fuel cells rather than solar panels?

The Soyuz 7K-LOK, a heavily-modified derivative of the 7K-OK, was to have been the Soviet equivalent of the Apollo CSM, taking two cosmonauts to lunar orbit (from where one would transfer to the LK ...
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0answers
119 views

Detailed information about the Soyuz descent module connection box?

Anyone have some detailed information about how all this connectors, located in the soyuz descent module? Are they used only when they setup the Soyuz or they are ...
16
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1answer
563 views

Is there an explanation for repeating Soyuz accidents involving misfiring of explosive bolts?

In the Soyuz program, quite a few accidents have been caused by malfunctions of the explosive bolts: Soyuz 11: Explosive bolts designed to fire sequentially fired simultaneously instead, causing a ...
3
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1answer
165 views

Seating in Soyuz 18 capsule

Working on an alternate-history SF story that involves an orbital rescue in 1975 requiring use of the Soyuz 18 capsule. This had room for carrying up to 3 cosmonauts to orbit but only carried 2 to ...
14
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2answers
3k views

How similar are Soyuz and Progress?

Superficially the Soyuz and Progress spacecraft look very similar: (Soyuz TMA-7) (Progress M-52) So it would be easy to imagine that they share a common service module and/or orbital module. But ...
6
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3answers
828 views

Soyuz has a Space Periscope?

The image Photo ID: ISS049-E-003166 can be found in Flikr and Wikimedia Commons as well as in Spaceflight Now. There is a long (perhaps 1 meter?) green structure that is sticking out from the side of ...
5
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1answer
548 views

Could the Orion or Apollo command module safely land on land in an emergency due to a navigation error?

So we all know that the Apollo missions used a water landing, as will Orion, while the Soyuz lands on land but can land on water if needed. What would have happened if an Apollo crew began reentry in ...
15
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1answer
1k views

Soyuz Steering during Re-Entry

In this youtube video, it talks about steering Soyuz by changing lift. Why does roll rotation help in changing lift and also helping in cross range steering? I am looking for an answer from ...
19
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1answer
2k views

How did the attitude system of the uncrewed Soyuz 7K-OK No.1 fail on the launch pad in 1966, killing ground staff as LES was activated?

Wikipedia has a stub article on the loss of the Soyuz 7K-OK No.1 test flight in 1966-12-14, but this part doesn't make sense to me: However, once the Soyuz rocket's engines ignited, they did not ...
4
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2answers
795 views

When astronauts or cosmonauts get seated in the spacecraft, are they actually sitting up or lying down?

This might be more of a physics question. If it is, I'll post it in the physics site. If the spacecraft is vertical, wouldn't the astronauts be seated in a lying position so that the G forces do not ...
10
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2answers
4k views

Why will the Orion system land on water, while the Soyuz lands on land?

I wonder why the Orion Multi-Purpose Crew Vehicle will only allow ocean landings while the Soyuz spacecraft is capable of landing on land? Also, what mode of landings does the Chinese space program ...
3
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1answer
861 views

Where is the hole now? (ISS/Soyuz spacecraft hole)

Gizmodo's Report: ISS Hole Drilled From the Inside, Cosmonaut Says has made me realize I've lost track of the hole. It was in the part of a Soyuz spacecraft docked to the ISS wouldn't contain the crew ...
11
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1answer
1k views

Can a Soyuz-MS still propel itself back to earth if all its Hydrogen Peroxide decomposed?

In this answer it is stated that: If the fuel fully decomposes then return to Earth is still possible but only via ballistic descent I find it a little bit surprising, but maybe there is enough Δv ...
2
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0answers
88 views

Could a Soyuz-MS deorbit after a failure of its deorbit engine?

The scenario: A Soyuz-MS spacecraft is on-orbit and ready for its deorbit burn. The crew then discover that there is a fault in the propulsion system and the deorbit engine can't fire. The craft is ...
4
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2answers
237 views

What do the insulation and meteorite protection layers being opened on the Soyuz MS-09 spacecraft look like?

This current news item in TASS Russian cosmonaut Kononenko approaches Soyuz MS-09 spacecraft for inspection says: Earlier in the day, the two Russian cosmonauts began their six-hour spacewalk, ...
9
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2answers
2k views

Reasons for using a bi-elliptic transfer for Soyuz-ISS rendezvous

According to the ESA movie Soyuz rendezvous and docking explained, Soyuz uses a bi-elliptic transfer to move from the phasing orbit to the ISS orbit. Why is this more complex transfer used instead of ...
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1answer
618 views

What if an ISS astronaut refused to leave the space station? [duplicate]

When a mission to the ISS ends and the astronauts/cosmonauts shall leave the ISS with the Soyuz/Dragon spacecraft, what if an astronaut refuses to enter the Soyuz? What if he/she wants to remain on ...
9
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1answer
388 views

Any risk from Soyuz 22-ton fuel dump?

Following the recent mishap with the Soyuz, Kazakhstan's deputy minister for defense and the aerospace industry said that about 22 tons of fuel (kerosene and liquid oxygen) were dumped/fell over the ...
22
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1answer
1k views

What are the reasons Soyuz's lifespan in orbit is limited?

Following the recent Soyuz failure news, I found out that the currently docked Soyuz expires in the foreseeable future, leaving the crew with no means to return back to Earth. What are the reasons ...
17
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1answer
1k views

Was the LES used in the MS-10 abort?

I can find no clear information regarding the use of the launch escape system in today's Soyoz MS-10 abort-to-ground. The failure seems to occur just as LES jettison is scheduled to take place. The ...
19
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2answers
5k views

What eliminates the velocity when occupants return from ISS to earth, and how much?

The ISS has an orbital velocity of ~28000 km/h; the velocity $v$ relative to the landing site of the descent module is probably even higher than that most of the time. Once the occupants have landed, ...
10
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1answer
334 views

Is this a photo of today's Soyuz anomaly happening in flight seen from the ISS? What are the little dots?

ISS Exp. 57 Cmdr. and ESA Astronaut Alexander Gerst's Tweet today says: Glad our friends are fine. Thanks to the rescue force of >1000 SAR professionals! Today showed again what an amazing vehicle ...