pretty sure we're on a collision course with Andromeda, we're gonna go to it whether we like it or not
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Space is really cool let's post our favorite videos or facts about it!
- Thread starter Cantaim
- Start date
pretty sure we're on a collision course with Andromeda, we're gonna go to it whether we like it or not
It is accurate for anything outside of our local group. Our local group is gravitationally bound. There are several galaxies in our local group so it is conceivable to visit other galaxies in the local group.
he says at 1:50 "how far can humanity go? the local group"
there are other galaxies in our local group, including Andromeda
OP
OP
Just gonna thank everyone that has been posting videos I don't reply to them or else I'd take up the whole thread but I do watch everyone that comes in!
The estimates are somewhere between 200 billion and 2 trillion galaxies in the universe.
Black holes warp space so much that if you could orbit a black hole close to the event horizon, you could see the back of your own head.
The sun in the sky that we see is always 8 minutes 20 seconds in the past.
We will never see the current Sun in our life time.
This picture is both present day and 2.5 Million years old.
Was going to post something like this. I like that looking at the sky at night, much of what you are looking at doesn't exist anymore, and there is new stuff in its place that you can't see yet. A whole evolution of life equivalent to Earth on another planet could yet to be visible to us in the sky, but may have already run its course and been wiped out before we could even detect that the planet it resided on existed at all.
My favorites are random little things like the Phobos 2 and the computer malfunction combined with the unusual last scan. Of course you can attribute the last scan to the malfunction, but it's amusing watching ufo nuts go mad over it too.
Plus bizarre phenomena like Eta Carinae. Pulsars and Magnetars are some next level shit too.
Plus bizarre phenomena like Eta Carinae. Pulsars and Magnetars are some next level shit too.
Space Engine been posted? http://spaceengine.org/
One cool thing that gets to me is that astronomers theorize the existence of "ocean planets" that are really just massive balls of H2O in various states. Not rocky planets covered in water, but just a ball of water, or at least a planet more than 20 percent of the mass of which is (Earth's mass is only 0.05 percent water). Like, the top layer is an "atmosphere" of water vapor, below which the atmospheric pressure creates a global ocean that can be like 20 or 50 miles deep (Earth's deepest ocean point is like six miles), at which point the extreme pressure creates a mantel layer of ice.
Another theorized type of planet is the "eyeball Earth." Essentially, an earth-like planet that's tidally locked with one side always facing the sun. The side facing the sun would be a perpetual daytime desert, possibly covered by a perpetual hurricane, whereas the other side would be a massive glacier covering half the planet and plunged in eternal darkness. Only the "dawn" or "dusk" zone would truly be Earth-like.
One cool thing that gets to me is that astronomers theorize the existence of "ocean planets" that are really just massive balls of H2O in various states. Not rocky planets covered in water, but just a ball of water, or at least a planet more than 20 percent of the mass of which is (Earth's mass is only 0.05 percent water). Like, the top layer is an "atmosphere" of water vapor, below which the atmospheric pressure creates a global ocean that can be like 20 or 50 miles deep (Earth's deepest ocean point is like six miles), at which point the extreme pressure creates a mantel layer of ice.
Another theorized type of planet is the "eyeball Earth." Essentially, an earth-like planet that's tidally locked with one side always facing the sun. The side facing the sun would be a perpetual daytime desert, possibly covered by a perpetual hurricane, whereas the other side would be a massive glacier covering half the planet and plunged in eternal darkness. Only the "dawn" or "dusk" zone would truly be Earth-like.
The emptiness of space is actually full of particles entering and exiting existence in the blink of an eye
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to put into perspective just how powerful a supernova is a supernova will emit more energy in it's explosion than our sun will in it's entire life time.
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Man there are some absolutely stunning shots in that article. Might pick up Pettit's book now.
Blue Wave over the Earth. Flush the sewers and nourish the land.
I guess it's not a proven fact and probably will never be proven, but I always like the idea that there could be multiple Big Bangs that have occurred or will occur, but it's well beyond our observable universe, and each of those universes would have it's own physics.
If you don't follow NASA's Astronomy Pic of the Day, it's well worth it to do so. Enjoy the backlog!
Also, PBS has a very nice youtube channel, called PBS Space & Time. Check it out: https://www.youtube.com/channel/UC7_gcs09iThXybpVgjHZ_7g
Saldy pictures don't render space justice.
But if we could see the Andromeda Galaxy in the sky, it would be this size:
But if we could see the Andromeda Galaxy in the sky, it would be this size:
Wasn't there news a couple of years ago of a supernova that was rocketing through space in a different galaxy, basically obliterating everything in its path?
I remember reading that and being impressed by the scale of the destruction. Maybe I am getting something mixed up though.
I remember reading that and being impressed by the scale of the destruction. Maybe I am getting something mixed up though.
Lol, what. I don't get this... reference?Pluto then:
Pluto now:
I might be misremembering, but didn't this image result from whomever took it pointing the telescope(s) in a relatively dark region? Fucking nuts.The Hubble Extreme Deep Field. I believe there's only two single stars in the image - the rest, even the tiny smudges, is all (distant) galaxies. For reference, the size of the image is only a small fraction of the angular diameter of the moon.
The sun is almost exactly 400 times bigger than the moon, but it's also almost exactly 400 times further away, so from our perspective they appear to be the same size. This is why the moon covers the sun exactly during a solar eclipse.
Not sure if anyone has responded with this, but:
Not sure if anyone has responded with this, but:
Yeah, it boggles my mind to think of stuff like this. Like, the light from the closest star we see every night is 4 years old. Some of the stars we see at night must be thousands and tens of thousands of years old. They might not even exist any more.
One of my personal favorites: sunset on Mars. Feels like it could have been a vacation picture.
This is beautiful :)
Yes, that's why there are only two single stars in the image.
