Recent comments in /f/space
Azrael_The_Bold t1_j51r85e wrote
Reply to comment by PandaEven3982 in ClearSpace raises $29 million ahead of first debris removal mission by sillychillly
Lmfao I don’t know how that even remotely would signal me as an incel, I thought your comment was cool and as a sci fi nerd I thought it was a fun idea. No need to be rude!
ramriot t1_j51qr3v wrote
Reply to comment by ClearOptics in Ancient humans and their early depictions of the universe: “It is no exaggeration to say that astronomy has existed as an exact science for more than five millennia,” writes the late science historian John North. by clayt6
You know, in the before times you know what the other predator species called humans with bad eyesight, LUNCH!
MaxillaryOvipositor t1_j51pp57 wrote
Reply to comment by GimmeTwo in The Perseverance Rover from NASA collected regolith by johnkoubeck
It's to differentiate it from "soil," which is strictly biological in nature.
PandaEven3982 t1_j51plla wrote
Reply to comment by Azrael_The_Bold in ClearSpace raises $29 million ahead of first debris removal mission by sillychillly
SMH. If that's your first thought, let's play find the incel.
PandaEven3982 t1_j51p9h4 wrote
Reply to comment by binormal in ClearSpace raises $29 million ahead of first debris removal mission by sillychillly
Better hope that parachute works. Might make a good splash at terminal velocity. Keep it in orbit. Smelt when we build the infrastructure.
GimmeTwo t1_j51p1pj wrote
Reply to comment by MaxillaryOvipositor in The Perseverance Rover from NASA collected regolith by johnkoubeck
So sand and dust and other inorganic particulates.
Yeah; I guess it would be a real story if there was organic material.
cyborgborg777 t1_j51ouij wrote
Reply to Ancient humans and their early depictions of the universe: “It is no exaggeration to say that astronomy has existed as an exact science for more than five millennia,” writes the late science historian John North. by clayt6
I mean, id argue against it being an EXACT science 5k years; but ok.
[deleted] t1_j51ohrs wrote
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ClearOptics t1_j51o8vc wrote
Reply to comment by budgie0507 in Ancient humans and their early depictions of the universe: “It is no exaggeration to say that astronomy has existed as an exact science for more than five millennia,” writes the late science historian John North. by clayt6
Definitely, however take some solace in that it seems as each year goes by, a higher percentage of people need glasses. So you can draw that backwards and infer that barely anyone needed glasses in the before times. Before the dark times. Before we started looking down instead of out.
Azrael_The_Bold t1_j51o4es wrote
Reply to comment by PandaEven3982 in ClearSpace raises $29 million ahead of first debris removal mission by sillychillly
Now I just need to build a proper ship to intercept these craft and take the booty for myself. Space Piracy!!
casc1701 t1_j51nvhl wrote
The only way this business model work is if Starship succeeds in lowering the cost of $/kg in orbit by one order of magnitude. The it will be cheap enough for governments to enforce a "pick your trash" rule on space launches.
binormal t1_j51ntwn wrote
Reply to comment by PandaEven3982 in ClearSpace raises $29 million ahead of first debris removal mission by sillychillly
What? From the article:
>This mission will see the ClearSpace use a spacecraft with four articulated arms to de-orbit part of a Vega rocket from low Earth orbit (LEO).
Assuming they're deorbiting the third stage, which has a dry mass of 1315 kg, they would be collecting about 1.315 metric tonnes of garbage.
MaxillaryOvipositor t1_j51narc wrote
Reply to comment by GimmeTwo in The Perseverance Rover from NASA collected regolith by johnkoubeck
Depends on how you define "dirt." Regolith strictly has nothing biological in it, which some definitions of "dirt," include.
Salty-Pack-4165 t1_j51mphp wrote
Reply to Ancient humans and their early depictions of the universe: “It is no exaggeration to say that astronomy has existed as an exact science for more than five millennia,” writes the late science historian John North. by clayt6
I would hazard a guess that astronomy/astrology was a mother of scientific though.
Available-Camera8691 t1_j51l683 wrote
Reply to comment by budgie0507 in Ancient humans and their early depictions of the universe: “It is no exaggeration to say that astronomy has existed as an exact science for more than five millennia,” writes the late science historian John North. by clayt6
Without glasses or contacts I can't even tell there are stars in the sky :(
tin_dog t1_j51jcqd wrote
Reply to comment by GimmeTwo in The Perseverance Rover from NASA collected regolith by johnkoubeck
Like concrete. Mix it in the right way and it may last for thousands of years.
ChefExellence t1_j51j6yx wrote
Reply to comment by CMDRLtCanadianJesus in ClearSpace raises $29 million ahead of first debris removal mission by sillychillly
Probably by just using the satellites onboard propulsion. Although given that this is just a test mission, just capturing the debris would be progress enough
OffusMax t1_j51isif wrote
Reply to comment by intuser in Are Two Tidally Locked Earth in One Solar System Possible? by Thirdy-DOg
I don’t have enough expertise to give you a definitive answer, but I think you don’t fully understand how Lagrange points work. Mind you, I’m not sure I understand how they work, either, so what I’m about to say may be worthless. So keep some salt handy.
A Lagrange point is a place relative to the orbit of the satellite object where the gravity of the satellite and its primary cancel out. Any third object that somehow wanders into one of these points tends to stay there because of the gravitational interaction between it, the satellite and the primary.
So there are Lagrange points relative to the Earth and the Sun where the gravity of both cancel out. The JWST is stationed at one of these points now. Saves JSWT a lot of fuel for station keeping.
There are Lagrange points relative to the Moon’s orbit where the gravity of the Earth and the Moon cancel out as well. We’ve placed nothing there yet but that could change one day.
The deal with Lagrange points is that any third object that somehow makes it’s way to the location of one of the Lagrange points tends to stay there. This happens with small objects such as spacecraft or asteroids floating around the solar system because they don’t have much mass relative to the Earth or the Moon to affect the location of the Lagrange Point.
Now let’s consider a planet.
Planets are much bigger objects. Everything in a planetary disk starts out orbiting the star. Objects collide with each other frequently. The thing is these objects are not initially in any Lagrange points. They approach and each attracts the other. The Lagrange points aren’t likely to be along the vector of approach and there’s a lot of force pulling them together. As they get nearer, the location of the Lagrange points change because of the large amounts of mass approaching each other. If they collide, after all, there would be a lot more mass where the original planet was, changing where the Lagrange points are; the same thing happens when the 2 planets are closing in on each other.
So planets, because they’re so big, will orbit each other or collide. I don’t see how they could be in each other’s Lagrange points.
PuddleCrank t1_j51hwwx wrote
Reply to comment by MathematicianSea5117 in Are Two Tidally Locked Earth in One Solar System Possible? by Thirdy-DOg
Sure, you could also orbit a Jupiter.
PuddleCrank t1_j51hhav wrote
Reply to comment by intuser in Are Two Tidally Locked Earth in One Solar System Possible? by Thirdy-DOg
The Lagrange point sets the mass of the third body to zero before solving the differential equation.
GimmeTwo t1_j51hd5p wrote
Regolith is just like sand and dust and dirt right?
PuddleCrank t1_j51hbig wrote
Reply to comment by Zerieth in Are Two Tidally Locked Earth in One Solar System Possible? by Thirdy-DOg
Or it could be living off that heat!
PandaEven3982 t1_j51h4vd wrote
Reply to comment by binormal in ClearSpace raises $29 million ahead of first debris removal mission by sillychillly
It's about garbage collection. You seem to be keen to deorbit what they collect. Okay. How many metric tonnes of garbage are we collecting? Is there an estimate?
[deleted] t1_j51h1px wrote
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ramriot t1_j51rm4z wrote
Reply to comment by 3SquirrelsinaCoat in Ancient humans and their early depictions of the universe: “It is no exaggeration to say that astronomy has existed as an exact science for more than five millennia,” writes the late science historian John North. by clayt6
This is a difference between popular science & academic writing that it took me until my 3rd year in astrophysics to really bottom out.
Today I find reading popular science magazines far less enjoyable & wish they were better written, but then I also recognise I'm no longer the target audience for the magazines that got me interested in astronomy in the first place.