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Crewed Spacecraft Missions.

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In manned/crewed spacecraft missions, can a spacecraft remain stationary i.e. not moving once launched in sky & space similar to a Helicopter and not that of a aeroplane?

If No, Why?

Thanks & Regards,
Prashant S Akerkardownload - 2020-11-18T152005.071.jpeg
 

rjenkinsgb

Well-Known Member
Most Helpful Member
Only by using fuel.
Without engines operating, any spacecraft (or object) is in "free fall" - it's path is controlled by the gravity of other bodies.

If that path is an orbit and outside atmosphere, it may be a stable situation, but it's then not stationary.
Likewise if it is in a Lagrange point of another body in orbit.

Otherwise it is accelerating towards whatever body or bodies have the most gravitational influence.
 

atferrari

Well-Known Member
Not moving you say.

WRT what?
 
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