Recent comments in /f/space
Anonymous-USA t1_j581h0f wrote
But this hypothetical “mass” would be traveling faster than the speed of light, which no mass can theoretically do.
Even a massless photon cannot escape a black hole, not because of the gravity (the photon has no mass and therefore immune to gravity), but because space through which the photon travels is itself warped. So the “escape velocity” exceeds any information, mass or massless, matter or energy, past the event horizon.
rocketsocks t1_j57vwre wrote
Reply to A review of recent space science papers about how volcanism killed Venus and maybe life killed Mars by tectonic
I think it's pretty likely that the majority of planetary bodies throughout the universe which have hosted life have done so for a comparably short period of time. Worlds like our Earth where life persists for several billions of years and develops into advanced multi-cellular life are probably fairly rare. Though on the other hand, there are so many stars and planets even in a single galaxy that there may be many such worlds in the Milky Way even if they make up a tiny percentage.
Bodongs t1_j57riwm wrote
Reply to comment by SnappleManTTV 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
What???? This is such a lie. Every history book I had growing up talked about the ancient Aztec's amazing understanding of astronomy and how it took western civilization generations to catch up to them. Don't make shit up and act like it is some gotcha go read a book.
froggythefish t1_j57nie5 wrote
Reply to comment by Glum-Relationship151 in Will Pluto ever be a planet? by twurbster
Half of the Kids can’t memorize 7 planets either so I don’t see an effective difference
[deleted] t1_j57lvj0 wrote
Reply to Will Pluto ever be a planet? by twurbster
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Glum-Relationship151 t1_j57cffp wrote
Reply to comment by froggythefish in Will Pluto ever be a planet? by twurbster
Kids. They can't learn easily 30 names.
gaze-upon-it t1_j57arya wrote
Reply to comment by ermagerditssuperman 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
Lives in both places and Nevada is a great place to see the sky.
[deleted] t1_j578q53 wrote
Reply to comment by scoopedy_coop in Will Pluto ever be a planet? by twurbster
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ermagerditssuperman t1_j577vu3 wrote
Reply to comment by gaze-upon-it 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
It's my favorite part about going back and visiting home in Nevada. My mom's house is high on a hill over Reno (NV hill, in the US Mid-Atlantic it would be a mountain) so it's outside of the city light pollution. I can go in the yard and look up and actually map out a bunch of constellations.
When I lived in DC for a few years, I was lucky to pick out 10 stars at night.
Now in an east cost suburb, I can see stars, but still nowhere near the level of the Nevadan night sky.
scoopedy_coop t1_j576nha wrote
Reply to Will Pluto ever be a planet? by twurbster
Is this the father of renowned scientist Scroopy Noopers?
twurbster OP t1_j5767p6 wrote
Reply to comment by mcvoid1 in Will Pluto ever be a planet? by twurbster
Fuck yeah
[deleted] t1_j5765sx wrote
Reply to comment by twurbster in Will Pluto ever be a planet? by twurbster
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mcvoid1 t1_j5761z2 wrote
Reply to comment by twurbster in Will Pluto ever be a planet? by twurbster
It's a rock in space. It doesn't care how you categorize it.
twurbster OP t1_j575izj wrote
Reply to comment by Dont____Panic in Will Pluto ever be a planet? by twurbster
Thank you. It’s starting to make sense, this question was a lot deeper than I thought. Is minor the same as dwarf?
Dont____Panic t1_j5756gj wrote
Reply to comment by twurbster in Will Pluto ever be a planet? by twurbster
They’ve created a class of object called a minor planet. It’s large enough to pull itself into a sphere, but it has an odd orbit, and hasn’t cleared its local area.
It is, however, quite different from an asteroid like Vesta which are oblong and in a “belt” of other objects.
twurbster OP t1_j574ugf wrote
Reply to comment by mcvoid1 in Will Pluto ever be a planet? by twurbster
Regarding the last two paragraphs, I understand now. Basically I can view Pluto however I want to.
joedimer t1_j574swu wrote
Reply to comment by twurbster in Will Pluto ever be a planet? by twurbster
Neptune and Pluto are pretty much never any where near each other so Neptune can’t clear Pluto. Plus Pluto is on a different plane than the rest of the solar system. Neptune is like 8000 time more massive than Pluto so it would most definitely clear it if they ever ran into each other, it’s just that they never have and likely never will.
Fuzakenaideyo t1_j5725tv wrote
What kind of permission is needed to mess with the space junk of others which presumably still belongs to the company or country that launched it
accomplishedidea957 t1_j571z4y wrote
Reply to comment by rosen380 in Will Pluto ever be a planet? by twurbster
Keep your friends close and your moos closer. Not so true
mcvoid1 t1_j571wp9 wrote
Reply to Will Pluto ever be a planet? by twurbster
I have some questions that need to be answered.
- Should Ceres be a planet? It's the largest asteroid in the asteroid belt (by a very wide margin) and is round, and about 9.1 × 10^20 kg. (Pluto is 1.30900 × 10^22 kg, so only about 10x bigger)
- Should Eris be a planet? It's the largest object in the Kuiper belt that we know of. It's also round, and is bigger than Pluto (1.67 × 10^22 kg, so like 25% bigger than Pluto)
Really what's going on is that there's kind of four "zones" of planetoids.
- The rocky planet zone
- The inner asteroid belt (where Ceres is)
- The gas giant zone
- The outer asteroid belt (where Eris and Pluto are)
The definition of planet makes it that it basically rules out the two asteroid belts because who knows where to draw the line between what in there is a planet and what isn't a planet.
So if we're including the stuff in those two zones, where should the line be drawn?
[deleted] t1_j571rk7 wrote
Reply to comment by p-d-ball in ClearSpace raises $29 million ahead of first debris removal mission by sillychillly
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twurbster OP t1_j571qgz wrote
Reply to comment by menezesja in Will Pluto ever be a planet? by twurbster
But it will at some point?
twurbster OP t1_j571np4 wrote
Reply to comment by GodzlIIa in Will Pluto ever be a planet? by twurbster
Based on the definition of a planet currently, I am asking if Pluto will ever be able to fit that description of a planet. Even if it takes a billion years or so.
neovb t1_j582aiu wrote
Reply to The critical atom (thought experiment) by ThePropagandaTower
Relativity aside, something going the speed your mention would only hypothetically be able to escape the black hole before the event horizon. After it crosses the event horizon it could no longer escape the black hole's gravity.
But I think the answer to your question is no, since the faster something goes the higher it's mass. To reach the speed of light for anything with mass is effectively impossible, as at the speed of light any thing (no matter how small) would have an infinite mass and therefore require infinite energy.