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Questions tagged [mass]

Questions regarding the mass of spacecraft or other objects

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How much does JWST actually weigh?

I recently had to delete my answer to Why doesn't James Webb have a larger supply of thruster propellant? because @NgPh noted: As the last update, JWST weights 6200 Kg. jwst.nasa.gov/content/about/...
BrendanLuke15's user avatar
4 votes
0 answers
123 views

Mass Breakdown of Apollo CSM by Subsystems? (also Cost Breakdown)

I am looking for a mass breakdown of the Apollo Command and Service Module by subsystems, like this Lunar Module's chart from the NASA publication After LM. I am particularly interested in how much of ...
mini earth's user avatar
4 votes
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How to estimate total CO2 emission per year due to rocket manufacture?

I'm working on a study on greenhouse gas emissions related to rockets. While I have the post-launch (atmospheric) emissions, I need data for emissions related to production. For example, according to ...
dxcfvgbh cfvgbhnj's user avatar
4 votes
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229 views

Is Earth's Moon gaining or losing mass?

The Earth gains mass from dust/meteors (and a tiny, tiny bit to increasing temperatures/energy), but loses mass from hydrogen/helium escaping and nuclear reactions. It's estimated to have a net loss ...
Nate Lowry's user avatar
3 votes
0 answers
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How do ablatively cooled rocket engines compare to regeneratively cooled ones, in terms of mass?

Assuming equivalent thrust and single continuous burn duration, is there a figure that roughly tells the difference in mass between these two engines cooling methods? This question focuses on first ...
user avatar
3 votes
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324 views

Is there an estimate for the average mass of all meteoroids and asteroids hitting Earth's atmosphere in one year?

I wonder how much mass is entering Earth's atmosphere every year in the form of meteoroids and asteroids. This excludes micro-meteoroids, dust particles, molecules etc. Quick search result talks only ...
Everyday Astronaut's user avatar
3 votes
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Are there any advantages to being a smaller spacecraft for reentry?

Could a ship drop its cargo or shed weight before reentry to lessen the strain on the ship during reentry? Would a ship breaking down to smaller parts before reentry have any advantages over being one ...
Muze's user avatar
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What is the total mass of everything launched that are still in space?

Inspired by this question, total mass ever launched to orbit (this is a different question, as many of the things launched have decayed by now.) How much of it is still up there? Out of that again, ...
SE - stop firing the good guys's user avatar
1 vote
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Has NASA published any information that better quantifies the mass budget requirements for "back to the moon ... this time to stay"?

I'm interested in those elements of their plans that will help me to estimate a yearly mass budget, such as how many crew at a time, how long will they stay each time, how often they will be rotated ...
phil1008's user avatar
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1 vote
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How heavy is an orbital pogo stick?

Moving people from a A to B in space often requires a significant change in velocity, requiring propellant eating into the mass budget. But most of this propellant is "wasted" in moving a ...
SE - stop firing the good guys's user avatar
1 vote
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Time a rocky satellite in lunar "frozen" orbit spends in Earth's umbra during total lunar eclipse

I am wondering how long a large satellite in a lunar frozen orbit would remain in the Earth's umbra during a total lunar eclipse. The satellite is spheroid with a diameter of 200 km. Let us say that ...
JM Yaden's user avatar
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How much of a deep space spacecraft's structural mass is useless dead weight after launch? Any plans to shed it in the future?

After seeing this in Security SE Magnetic core memory isn't quite extinct yet. The two Voyager spacecraft used it and are still functional. Core was/is certainly non-volatile. I did some ...
uhoh's user avatar
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How much did each MarCO 6U cubesat weigh?

Yes the answer is zero now because they are weightless, but I used past tense. In any event, let's try to find a good, reliable source for each spacecraft's mass and whether that number is dry or ...
uhoh's user avatar
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1 vote
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Mass/weight information about stage separation mechanism

How can I get mass/weight information about rocket stage separation mechanisms that are used in multi-stage rockets? I plan to create an excel table to compare stage separation mechanisms by weight ...
Faruk UNAL's user avatar
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Hypersonic dynamic shift in large vs. small lifting bodies

Background: Lifting bodies have been tested at small scales, though not during re-entry. For instance: the NASA HL10 Such Lifting-Body designs are seemingly here to stay with craft such as Dreamchaser ...
AnarchoEngineer's user avatar