Questions tagged [retrorockets]

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4
votes
1answer
79 views

What was the radius of Insight's disruption of Martian regolith?

A NASA animation depicts the Martian regolith being disturbed by the retrorockets of the Insight spacecraft while landing. Did NASA estimate the radius of the disruption, or was there any indication ...
22
votes
2answers
2k views

How dangerous are RCS thrusters?

How dangerous are RCS thrusters, in a vacuum, to A. other spacecraft, especially when docking, and B. astronauts in EVA suits? How far away do you have to be to be safe / do RCS thrusters need to be ...
3
votes
1answer
523 views

When did soviet capsules begin using retropropulsion immediately before landing?

Wikipedia's Yuri Gagarin says: At about 23,000 feet (7,000 m), Gagarin ejected from the descending capsule as planned and landed using a parachute. and the section Vostok_programme; Vostok 3KA ...
6
votes
2answers
450 views

Why did the manned Mercury-Redstone flights carry and use retrorockets?

The Mercury-Redstone programme, a subset of the Mercury human spaceflight programme, used a modified version of the Redstone missile for suborbital flights in space. It culminated in two manned ...
18
votes
1answer
530 views

Was Jules Verne the first to propose the retro-rocket concept?

In his novels 'From the Earth to the Moon', and 'Around the Moon', Jules Verne writes about a set of rockets fitted to the spacecraft he imagined, that were intended to be fired in order to slow down ...
6
votes
2answers
3k views

What is Retropropulsion?

In a recent news NASA, SpaceX Share Data On Supersonic Retropropulsion My question is what is Retropropulsion?