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Why create a production line for the SpaceX Starship?

Musk is creating a Starship "production line", because obviously, he wants a lot of Starships. This aligns with the company's goal of "making humanity a multi-planetary species". As for "where is ...
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Why create a production line for the SpaceX Starship?

Bob Zubrin, of Mars Direct fame, has been critical of the SpaceX Mars plan. He suggests that it makes no sense to send a full Starship too Mars, instead use it to launch the Mars vehicle and just use ...
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Why have no reusable launch technologies been developed?

Mass fraction and Tsiolkovsky's rocket equation make for major hurdles. Mf, or the ratio of propellent to dry mass is given by: $Mf=1-e^{-delta V/V_{exhaust}}$ To climb out of a steep gravity well ...
• 15.2k

Why have no reusable launch technologies been developed?

The basic reason is it that it takes a lot of velocity to put an object in orbit. For example the orbital velocity at LEO is around 7.8 km/s. What this necessarily means, is that the final stage of ...
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Is there a comprehensive list of NASA contractors with a list of projects that they are assigned to do?

You can see all the external spending by Agency for the government at usaspending.gov, Just do an advanced search limiting the awarding agency to NASA. Edit: Search links go stale after a while, here ...
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"Lunar vacuum cleaner": Design considerations for regolith dust suction system in exospheric conditions

You cannot vacuum in a vacuum, if you want to use a pressure differential to move dust on the moon you will have to supply the gas yourself so it's no longer a vacuum. You could set up a system which ...
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"Lunar vacuum cleaner": Design considerations for regolith dust suction system in exospheric conditions

Have a look at this paper, which discusses using magnets to collect the regolith in tubes similar to a maglev system. It also claims that the very fine dust particles can remain electrostatically ...
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Can one put small items in orbit, cheaply?

The lowest price I have seen for a launch vehicle to place an object in Low Earth Orbit is the Vector-R by Vector Systems. This rocket has a maximum payload of 63 kilos. The cost for a launch is 1.5 ...
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Orbit Guardians - bs, right?

Sounds perfectly plausible. As the other answers have shown, you need roughly 200 m/s delta V to reliably and quickly deorbit such a droplet. For every gram of mass in a droplet, you need to deliver ...
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Orbit Guardians - bs, right?

Orbit Guardians - bs, right? Scary? Yes! But no, not necessarily 100% bs. Answers to How hard do you have to throw something off the ISS to make it deorbit? are in the "ballpark" of 90 m/s (...
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How many people work in the Chinese space program?

While living in China (2004 to 2007), I overheard that China was hiring every space engineer its universities were producing every year. So, at the time, I heard that their center in Gansu province ...
1 vote

What resources could be gained from asteroid mining that would be worth the effort?

Not a single poster has mentioned cobalt. Chondritic metal is an alloy of siderophiles (“iron-loving” elements), the next after the host iron being nickel, then cobalt. Nickel is not particularly ...
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