Recent comments in /f/space
swishphish1 t1_jd64pzo wrote
Reply to Random thought I had in science class by VanCro999
A big part of global warming (in this specific sense, keeping the earth at a hospitable temperature for millions of years) is caused by rain clouds, surprisingly enough. Not saying it couldn’t be done with conventional greenhouse gasses (carbon dioxide and methane), but I think it would be better to do it in a natural sense (water vapor). That’s an interesting thought though, and I encourage you to explore it more with your teacher.
OnlyAstronomyFans t1_jd64lq3 wrote
Reply to comment by Majestic_Pitch_1803 in Couldn’t we land on an asteroid that is passing through our solar system and use that as a vessel for interstellar travel? by [deleted]
This is going to be my last response to you because I am positive that you’re trolling us, trying to get karma so you can post spam in other subs that have rules about new accounts posting.
That said but the only reason anyone would do this would be because they wanted themselves and all of their descendants to live on that asteroid forever. You would need insane technology just to get to the interstellar object, let alone land and mine it. For sure it is not anything that would happen in either of our lifetimes. Fairs seas, my little troll.
Nerull t1_jd646f7 wrote
Reply to comment by Majestic_Pitch_1803 in Couldn’t we land on an asteroid that is passing through our solar system and use that as a vessel for interstellar travel? by [deleted]
Not really. For interstellar asteroids you're looking at transit times between star systems measured in millions of years. Nuclear power isn't going to last that long. Frankly, neither is human technology. If people did somehow survive on an asteroid for millions of years, they wouldn't have any cultural memory left of how they got there or why and they would have evolved to be substantially different than humans on Earth - which they might find at their destination anyway, if Earth humans develop faster propulsion methods.
Nopants21 t1_jd64187 wrote
Reply to comment by Majestic_Pitch_1803 in Couldn’t we land on an asteroid that is passing through our solar system and use that as a vessel for interstellar travel? by [deleted]
I think you're imagining a much larger asteroid than what is common. Oumuamua was at most a kilometer long and it was considered a large enough object. Most fly-through objects are much too small to be mined productively and also hold together well enough to act as shielding.
On top of that, the amount of stuff you'd need to mine it is also much larger than you might think. You need refining, production, maintenance, energy, and the rovers you're sending need precision tools to create precision installations. Think of the amount of mining that goes into making a single rocket on Earth, it requires several countries working together for every rocket launch, each with a power grid, an industrial base, a workforce, etc.
As a last point, if the object is going fast enough, staggering your operation so that it's not all in one go makes it so that everything needs to occur in a short timeframe, because the object is zipping out of the solar system pretty quick. By the time you see the object, calculate where it's going, get everything organized, you might have missed it.
Alvsvar OP t1_jd63wnf wrote
Reply to comment by EntropicallyGrave in How much space does it require to accommodate 1 hydrogen atom? by Alvsvar
Danm, that was one hell of answer thanks for the info although the units are abstract for me and I can't even remember Avogadro's law . Im probably getting this wrong but does this mean in 22.4 l of empty space there is one hydrogen atom? Thats super interesting how little hydrogen is in an atom, those strong nuclear forces.
The reason Im asking this is I was wondering if you could have a "net" that could collect these and other atoms, for a space ship. I was also interested how much hydrogen was there and how empty it really was. Its so crazy these coalesce into everything that built the universe.
OnlyAstronomyFans t1_jd63rds wrote
Reply to comment by Majestic_Pitch_1803 in Couldn’t we land on an asteroid that is passing through our solar system and use that as a vessel for interstellar travel? by [deleted]
At this point most of us have realized that either you’re trolling us or you’re too simpleminded to grasp the basic physics of this.
Brain_Hawk t1_jd63jzf wrote
Reply to comment by Majestic_Pitch_1803 in Couldn’t we land on an asteroid that is passing through our solar system and use that as a vessel for interstellar travel? by [deleted]
Asteroids are not typically that large, of course there's exceptions. But the gravity on this supposed intersolar object would be almost definitely miniscule. Finding a very large asteroid passing through the solar system seems to be rare, as far as I am aware, though I admit my knowledge here is very limited
So why would anybody want to live on such an asteroid? It's not going anywhere fast. The nearest star intersection is likely to see will be somewhere in millions of years in the future. So all these people are going to go live on this asteroid which is basically living in outer space with no gravity, which will have all kinds of problems for your body, and now they're cut off from the earth and have to live in a small self-sustained society which is by its very nature going to have extraordinarily strict rules and limit people's personal freedom to be huge degree, limit what you can do what you can see if you can talk to, definitely limit who you can sleep with and how much population you're allowed to grow.
Also that in a few million years maybe it will pass through some of the solar system that may or may not have some useful thing to visit?
Nah. That's not a mission that's going to happen even if it were feasible
Nerull t1_jd63gc2 wrote
Reply to comment by Majestic_Pitch_1803 in Couldn’t we land on an asteroid that is passing through our solar system and use that as a vessel for interstellar travel? by [deleted]
Asteroids are not traveling nearly fast enough to be useful to transit from one place to another.
Realize you're talking about transit times measured in millions of years.
Even at these slow speeds, we basically get one shot to intercept it before its out of reach. There is no time to slowly launch many smaller probes to it, or build up a base on it.
Majestic_Pitch_1803 t1_jd63c8x wrote
Reply to comment by Diesalotwpg in Couldn’t we land on an asteroid that is passing through our solar system and use that as a vessel for interstellar travel? by [deleted]
I mean there could be more, just invisible. Could use gravity assists to reach further ones.
Brain_Hawk t1_jd637v6 wrote
Reply to comment by Beaver_Sauce in Couldn’t we land on an asteroid that is passing through our solar system and use that as a vessel for interstellar travel? by [deleted]
This is a really good point that didn't occur to me right away, but it's totally true.
At that point the asteroids only helpful if it provides something more. And frankly, the second part release skills it as not worth the time and effort, hop on an asteroid and go... Nowhere
Majestic_Pitch_1803 t1_jd62vkq wrote
Reply to comment by OnlyAstronomyFans in Couldn’t we land on an asteroid that is passing through our solar system and use that as a vessel for interstellar travel? by [deleted]
A quick answer would be protection from space debris. More land with which to make the space craft more reinforced and with which to potentially build further technological instruments, or even live on if that was a possibility.
Even so. It could provide avenues for slowing down the payload once reaching the destination. If you could mine for fuel, that’s a win.
Majestic_Pitch_1803 t1_jd62qcb wrote
Reply to comment by pmMeAllofIt in Couldn’t we land on an asteroid that is passing through our solar system and use that as a vessel for interstellar travel? by [deleted]
Not oumuamua specifically, just an omuamua like object. As an example that such a thing does exist.
Nerull t1_jd628wl wrote
Reply to comment by xzeion in Couldn’t we land on an asteroid that is passing through our solar system and use that as a vessel for interstellar travel? by [deleted]
Landing a probe on one doesn't save any fuel, because the probe has to match the trajectory of the asteroid in the first place - which means its going wherever the asteroid is going already.
[deleted] t1_jd61sum wrote
Reply to Random thought I had in science class by VanCro999
You could make a synthetic atmosphere on mars. This is a cool thought.
CFCYYZ t1_jd60wvt wrote
Reply to Random thought I had in science class by VanCro999
Leave Mars be; there is much to learn.
While we dream of making Mars look like Earth, we are busy making Earth look like Mars.
Terraform Earth.
[deleted] OP t1_jd60paq wrote
[deleted] t1_jd605l8 wrote
[deleted]
[deleted] t1_jd5zi7c wrote
Reply to comment by No-Fortune-5159 in Japanese lander enters lunar orbit by Afrin_Drip
[removed]
[deleted] OP t1_jd5z5oz wrote
Reply to comment by b_a_t_m_4_n in Couldn’t we land on an asteroid that is passing through our solar system and use that as a vessel for interstellar travel? by [deleted]
[removed]
[deleted] OP t1_jd5z4bo wrote
Reply to Couldn’t we land on an asteroid that is passing through our solar system and use that as a vessel for interstellar travel? by [deleted]
Imagine you travel for 50 years but fall off the Astroid. Now you’re in the middle of no where lmao
OnlyAstronomyFans t1_jd5yqe2 wrote
Reply to comment by Macktologist in Couldn’t we land on an asteroid that is passing through our solar system and use that as a vessel for interstellar travel? by [deleted]
My man should just hop on Eros, maybe he can talk the Ring entities into going interstellar instead of to Venus
1ofThoseTrolls t1_jd5y2hd wrote
Reply to Random thought I had in science class by VanCro999
Whatever process is used to make Mars habitual. Would take years, if not centuries, to achieve
pmMeAllofIt t1_jd5y2e6 wrote
Reply to comment by Majestic_Pitch_1803 in Couldn’t we land on an asteroid that is passing through our solar system and use that as a vessel for interstellar travel? by [deleted]
How is the object going in a desired location. The chances of it's trajectory being exactly where we want it to be is unlikely. But even so, we manage to hitch a ride. Oumuamua at it's perihelion was doing 87km/s, but climbing away from the Sun slows it down. From what I see it will average about 26km/s. At that speed it will take 15,000> years to leave the solar system, and about 50,000 years to reach the nearest star.
As crazy as it sounds, it's not fast enough.
OnlyAstronomyFans t1_jd5xqis wrote
Reply to comment by Majestic_Pitch_1803 in Couldn’t we land on an asteroid that is passing through our solar system and use that as a vessel for interstellar travel? by [deleted]
Why wouldn’t you just stay in the ship that you built that already had enough Delta V to escape the system? I see what you’re getting at but why would you want to do it? The thing would be moving so fast you would spend so much energy trying to catch up to it then you’d have the complication of trying to land on it and hope that it fits your needs. All those pictures you saw of those previous interstellar objects were just artists depictions. Nobody could image them well enough to know what they were made of or what their spin rate was, really anything about it, other than its speed and trajectory.
Unless we’re already really good at interstellar travel, what you just described is the suicide of whatever crew was on that ship
[deleted] t1_jd659jl wrote
Reply to Random thought I had in science class by VanCro999
[removed]