Top new questions this week:
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Graphene would be a great material to build a rocket out of. Graphene is extremely thin. One single atom thin layer of graphene can withstand 150 000 000 psi (1034.2136 GPa). A square meter of this ...
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SpaceX uses the Merlin Vacuum engine on the second stage of the Falcon 9 launch vehicle. Does the merlin vacuum engine gimbal or does the second stage uses only nitrogen cold gas thrusters for ...
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This question is not about rockoons, which are rockets using balloons as launch platforms to start from a greater altitude. This question asks about using the balloon itself as the rocket, like a toy ...
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Can something like SpinLaunch actually work?
It appears that Spinlaunch attempts to accelerate a capsule to very high speeds and then basically throw it into space.
A regular rocket is moving slowest ...
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I haven't been able to find a current report on the state of Hubble's orbital decay and I'm hoping someone can direct me to that info. The satellite tracker sites just present an average or estimate ...
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I'm currently attempting to plan out a mission where, in 2029, during Apophis's close approach to Earth, a rocket is sent up to intercept Apophis and decelerate it, making it orbit the Earth. At it's ...
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This Planetary Society article explains how crater density per unit area on the lunar surface helps identify what regions are older/younger than others. It also mentions that this chronology can be ...
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Greatest hits from previous weeks:
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Is there any other type of nozzle other than common convergent-divergent nozzle (see picture below) which is used in many rockets?
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Basically, what the title asks. To my understanding, New Horizons is currently the fastest spacecraft that's moving away from the Sun, with arguably only Helios-A and Helios-B possibly faster still, ...
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Sources, including NASA and media, all emphasise that JWST at L2, is a million miles away, and therefore "if anything goes wrong, nothing can be done, it can't be serviced".
But over 50 ...
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Incidentally I don't mean "on the lunar surface, asleep laying on the surface of the moon" :)
So (A) who (if anyone) was the first human to actually be asleep (that is to say, presumably inside the ...
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As a student of economics and finance I would love to learn more about the cost structures of sending a payload into orbit.
More specifically -
What is the cost-per-pound to send something into LEO ...
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The Wikipedia page for the International Space Station says that it has a fairly Earth-like, sea-level atmosphere: 21% oxygen, balance nitrogen at 101.3 kPa. Supposedly it's because a pure-oxygen ...
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Kerbal Space Program is an independent spaceflight simulation game, which has become quickly popular due to being (kind of) precise at simulating actual spaceflights.
But how precisely? How close is ...
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Can you answer these questions?
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I'm working on a LEO-to-LEO transfer with low-thrust propulsion. I've generated a control sequence with a direct optimization implemented by me and I would like to use GMAT to validate the maneuver.
I ...
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The 2022 Planetary Decadal Survey (Chapter 22) states that "quiet cruise" phase of an interplanetary spacecraft will cost about 30 million dollars a year for NASA. "Quiet cruise" ...
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I ask the question in the title because I cannot find a clear answer.
It seems that in collision avoidance, the primary spacecraft is always more accurately known then the secondary. But I think this ...
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