Recent comments in /f/space
Curious-of-Evrything t1_j2fikam wrote
Reply to Want to Build Structures on the Moon? Just Blast the Regolith With Microwaves - Microwaves are useful for more than just heating up leftovers. They can also make landing pads on other worlds - Universe Today by vibrunazo
They want to build on moon or want ancient buildings on moon?
sadetheruiner t1_j2fi1av wrote
Reply to comment by Triabolical_ in Israeli pens plan for belt of solar panels on moon to power oxygen production. With NASA mulling nuclear reactor to generate energy, Ben Gurion University expert says his idea would produce same amount of power with six times less mass. by Zee2A
I believe most people would be more comfortable with a heat transfer system, but of course that’s more weight, more cost and more things to break.
athomasflynn t1_j2fhj9z wrote
Reply to comment by off_the_cuff_mandate in Want to Build Structures on the Moon? Just Blast the Regolith With Microwaves - Microwaves are useful for more than just heating up leftovers. They can also make landing pads on other worlds - Universe Today by vibrunazo
That's so far beyond the capability of our species that it's not even worth discussion. It's like saying that if we built a big enough skyscraper we'd have to worry about it knocking down satellites.
stormhawk427 t1_j2fhem2 wrote
Reply to Israeli pens plan for belt of solar panels on moon to power oxygen production. With NASA mulling nuclear reactor to generate energy, Ben Gurion University expert says his idea would produce same amount of power with six times less mass. by Zee2A
Why not both? Unless the panels are charging capacitors for when the sun isn’t out.
urbanek2525 t1_j2fh9fh wrote
Reply to During WW1, a self-taught Ukrainian calculated the trajectory and method to get to the Moon and back. Almost 50 years later, NASA used his work and now the route of Apollo-11 wears his name - Kondratyuk Route by HydrolicKrane
Better to say:...a Ukrainian, self-taught mathematican...
The title reads like he taught himself to be a Ukranian
SirHerald t1_j2fgt8a wrote
Reply to During WW1, a self-taught Ukrainian calculated the trajectory and method to get to the Moon and back. Almost 50 years later, NASA used his work and now the route of Apollo-11 wears his name - Kondratyuk Route by HydrolicKrane
They need a better editor. Referring to "the Ukraine" and flying to the Koon.
off_the_cuff_mandate t1_j2fgh91 wrote
Reply to comment by athomasflynn in Want to Build Structures on the Moon? Just Blast the Regolith With Microwaves - Microwaves are useful for more than just heating up leftovers. They can also make landing pads on other worlds - Universe Today by vibrunazo
If they made a big enough tunnel the off gassing would effect the lunar orbit
Trshngrshn t1_j2fgge3 wrote
Reply to comment by athomasflynn in Want to Build Structures on the Moon? Just Blast the Regolith With Microwaves - Microwaves are useful for more than just heating up leftovers. They can also make landing pads on other worlds - Universe Today by vibrunazo
Weren't they using that in the video?
Reali5t t1_j2fg81o wrote
Reply to comment by Butuguru in SpaceX caps 2022 with record-setting 61st Falcon 9 launch by Master-Strawberry-26
NASA is one of their customers, but not their only customer, but hey if NASA can do it better and cheaper then go ahead.
ianindy t1_j2fg0va wrote
Reply to comment by KOREA_Beautiful_7777 in The most distant spacecraft in the solar system — Where are they now? by jormungandrsjig
It won't take much. The Voyagers aren't even one light day away yet, it will be a very very long time before they are anywhere close to a light year away.
mannishboy61 t1_j2ffrex wrote
Reply to Israeli pens plan for belt of solar panels on moon to power oxygen production. With NASA mulling nuclear reactor to generate energy, Ben Gurion University expert says his idea would produce same amount of power with six times less mass. by Zee2A
Who writes this stuff. "Six times less mass" . A sixth?
Reali5t t1_j2ffm8t wrote
Reply to comment by Tomon2 in SpaceX caps 2022 with record-setting 61st Falcon 9 launch by Master-Strawberry-26
Congrats, I no longer live in the USA either, moved to government run healthcare a year and a half ago. The one time I went to the hospital the first question was “do you have additional private healthcare”.
The hospital stay was great, I needed an IV as they didn’t bother bringing me anything to drink and I was the lucky one as I did get a bed, others were sitting during their stay. This is an EU country.
Spurrierball t1_j2ff5i4 wrote
Reply to Israeli pens plan for belt of solar panels on moon to power oxygen production. With NASA mulling nuclear reactor to generate energy, Ben Gurion University expert says his idea would produce same amount of power with six times less mass. by Zee2A
With how essential consistent power would be to every persons survival on a moon base why would they not simply do both?
[deleted] t1_j2ff1tt wrote
mienaikoe t1_j2fewd3 wrote
Reply to comment by gerkletoss in Israeli pens plan for belt of solar panels on moon to power oxygen production. With NASA mulling nuclear reactor to generate energy, Ben Gurion University expert says his idea would produce same amount of power with six times less mass. by Zee2A
At that point Solar thermal might be even cheaper. No pesky atmosphere to get in the way
33ff00 t1_j2few7v wrote
Reply to comment by MoogProg in What is our current "best guess" about how to observers that entered a black hole on opposite sides would look to each other once they crossed the event horizon? by WittyUnwittingly
Definitely raised more questions than it solved but it’s a good starting point, thank you.
HydrolicKrane OP t1_j2fes4q wrote
Reply to During WW1, a self-taught Ukrainian calculated the trajectory and method to get to the Moon and back. Almost 50 years later, NASA used his work and now the route of Apollo-11 wears his name - Kondratyuk Route by HydrolicKrane
How and why Kondrayuk's calculations got to the US is described in "Ukraine and the United States' e-book (in case someone is looking for details).
Stillwater215 t1_j2fegjv wrote
Reply to Israeli pens plan for belt of solar panels on moon to power oxygen production. With NASA mulling nuclear reactor to generate energy, Ben Gurion University expert says his idea would produce same amount of power with six times less mass. by Zee2A
The only scary thing about a fission reactor on the moon is getting fuel there. Rockets are definitely moving in the direction of being safer, but a rocket loaded with enriched uranium, if it were to explode during lift-off, would potentially contaminate a massive piece of land with radioactive material. Even if a rocket only fails 1/100th of the time, that’s still a huge gamble to make.
mykepagan t1_j2fe6sm wrote
Reply to Israeli pens plan for belt of solar panels on moon to power oxygen production. With NASA mulling nuclear reactor to generate energy, Ben Gurion University expert says his idea would produce same amount of power with six times less mass. by Zee2A
Which is less mass: “six times less“ or “one sixth”?
If I start with 100Kg and take away 6x that mass, do I end up with -500Kg? How does negative mass work?
cocktimus1prime t1_j2fd3es wrote
Reply to comment by Rare-Joke in Israeli pens plan for belt of solar panels on moon to power oxygen production. With NASA mulling nuclear reactor to generate energy, Ben Gurion University expert says his idea would produce same amount of power with six times less mass. by Zee2A
It will render moon uninhabitable.
radioli t1_j2fcxwx wrote
Reply to comment by rshorning in China hoping rocket that can send people to the moon will be ready to launch by 2027 by Saltedline
You just made a WRONG ANALOGY you probably didn't know.
Surveyor was a series of flyby + orbiting + landing missions.
Ranger was a series of flyby + orbiting + crashing missions.
None of them brought sample back home. The first pile of lunar sample was brought by Apollo 11 astronauts. Chang'e 1, 2, 3 (2007, 2010, 2013) had probably done much more than the Surveyors and Rangers. After all, they are late-comers.
Chang'e 5 was a lunar sample return mission in 2020. It was a combo of 4 modules, a lander, an ascender, an orbiter and a returner. It worked like this:
- After reaching the lunar orbit, the lander+ascender seperated from the combo and landed on the surface.
- After collection the samples were carried by the ascender, which lifted off from the lander and docked with the orbiter+returner.
- The ascender transferred the samples to the returner in orbit and left.
- Then the orbiter+returner accelerated and returned.
- The returner seperated from the orbiter and landed on earth.
- The orbiter passed Sun-Earth L1 Lagrange point and then entered the lunar DRO for VLBI tests. It is still working in orbit now.
Step 1-5 was a robotic miniature of the sequence of Apollo 11 mission. It was surely not an equivalent, but enough as an experiment to develop the pattern of crewed missions and further lunar mining projects.
The information above are all in ENGLISH, as accessible as a few clicks on Wikipedia.
As currently disclosed, the 2030 lunar crewed mission won't need some behemoth like Saturn V, but two or more CZ5DY launches to dock a crewed ship, a lander and some boosters together in LEO. Then the combo will bring astronauts to the moon and return like Chang'e 5. There are still 8 years to get this plan done. And this is just part of the moon base project.
MrTrocket t1_j2fcg5j wrote
Reply to comment by Recoveringpig in Want to Build Structures on the Moon? Just Blast the Regolith With Microwaves - Microwaves are useful for more than just heating up leftovers. They can also make landing pads on other worlds - Universe Today by vibrunazo
What about the ones that explode with tin foil and some draino in the movies 🎥
AnotherQuark t1_j2fbzaq wrote
Reply to comment by gerkletoss in Israeli pens plan for belt of solar panels on moon to power oxygen production. With NASA mulling nuclear reactor to generate energy, Ben Gurion University expert says his idea would produce same amount of power with six times less mass. by Zee2A
Meteorite hell i would imagine. Partially underground reactor seems safer
stewartm0205 t1_j2fin05 wrote
Reply to comment by Reddit-runner in What if we kept pursuing nuclear spacecraft propulsion? by rosTopicEchoChamber
The reactor is at the other end of the rocket far away from the payload in the high radiation environment of space. At worse, a small block of material should be enough of a shield. The radiation will dissipate at square the distance from the reactor. Then it had to penetrate the liquid hydrogen in the tank. As for the tank, a shiny thin Mylar sheet would be enough to reflect the rays of the sun. The Vacuum of space makes for a perfect insulator.