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56 votes
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What led Yuri Gagarin to believe his hatch was not properly sealed?

Gagarin learned about the problems with the hatch when the hatch was reopened. From Roscosmos: В 7.30 С.П. Королев поинтересовался о самочувствии у Ю.А. Гагарина. Казалось, что все идет согласно ...
A. Rumlin's user avatar
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26 votes
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Why weren't Gemini capsules given names?

Actually, the first manned one (Gemini 3) did have a name, "Molly Brown1". According to an article in Life Magazine, Oct 11, 1968, "Spacecraft Anonymous", upper NASA management became weary of ...
Organic Marble's user avatar
22 votes

Why weren't Gemini capsules given names?

Supplemental to Organic Marble's answer: The Gemini no-names policy remained in effect through the early part of the Apollo program as well; the Apollo 7 and 8 spacecraft were nameless. The names ...
Russell Borogove's user avatar
14 votes
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Why did the cones of the Mercury and Gemini capsules have a neck?

Understanding of re-entry heating at the time led to that decision. Around the time that Mercury was being designed, there was a huge problem in the field of ballistic missile design (which had a ...
Michael Stachowsky's user avatar
9 votes
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Capsule heat shielding made of Aerogel?

Aerogel doesn't have much mechanical strength. Orbital velocity is say 7800 m/s and you have to decelerate over say 300 seconds. Even if it's done carefully there are 2 or 3 gees of peak deceleration. ...
uhoh's user avatar
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9 votes
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What about Orion ISS missions?

Orion is: expensive to operate. It's heavier, bigger, but primarily the development was done in ways that drove the costs up significantly. It is capable of flight to lunar orbit - and it's an ...
SF.'s user avatar
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8 votes
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Apollo Command Module's impact attenuation system, what did the inner part look like?

The crushable ribs: The struts: Inside of the struts: This document says The cyclic strut utilizes cyclic material deformation concept of energy absorption by rolling ductile metal torus ...
Organic Marble's user avatar
7 votes

Capsule heat shielding made of Aerogel?

Aerogel is potentially a very, very useful insulating material for spacecraft, but it does not have the properties that would make it suitable as a heat shield (at least, not as the only or primary ...
ikrase's user avatar
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7 votes
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Why did the shuttle have rear-view mirrors?

The mirrors (the commander had one too) were to allow the front seat crewmembers to see panels located out of their range of vision while wearing the helmets. Specifically, panels L4 (located to the ...
Organic Marble's user avatar
4 votes

What space applications could benefit from batteries with much higher power densities than the common Li-ion type?

The improved energy densities alone has some use. For small cubesats specifically, there is always the dilemma of running off a simple single-use battery, or include the complete set of hardware ...
SE - stop firing the good guys's user avatar
4 votes

What space applications could benefit from batteries with much higher power densities than the common Li-ion type?

Almost all space exploration activities need electrical power. Batteries are needed except for those space exploration activities that are powered continuously and that draw power only at the rate ...
David Hammen's user avatar
3 votes
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How did Gagarin's flight affect improvements to the Vostok capsule?

«Восток-2» имел некоторые отличия от первого «Востока». Была доработана радиосвязь, заменена телевизионная система. Телеметрию дополнила коротковолновая система «Сигнал», которая служила для ...
A. Rumlin's user avatar
  • 7,863
2 votes

What space applications could benefit from batteries with much higher power densities than the common Li-ion type?

All space applications that require power storage would benefit from a higher density battery technology. Higher density power storage gives two primary benefits: Increased capability: More available ...
GdD's user avatar
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2 votes
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What are some details of ISRO's Gaganyaan Mission?

The Indian Human Space Flight Programme "Gaganyaan" (Sanskrit: गगनयान, "Sky Vehicle") Number of Crew member: Gaganyaan is a fully autonomous 3.7-tonne (8,200 lb) spacecraft designed to carry a 3-...

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