Minimal Posters - Six Women Who Changed Science. And The World.
batman1343 asked: So when black holes (considering they exist the way we see them) suck in large amounts matter and generate heat, they emit light correct? This has been puzzling me for awhile but, how is this possible if light can not escape a black holes gravity?
Yeah, so the best way to understand this is to not think of a black hole like a cylinder that things fall into. A black hole is more like a bowl that things roll into.
matter as it approaches a black hole is condensed and begins traveling at super fast speeds. (side note, the reason our sun gives off light is because it is a massive nuclear reactor, not because it is on “fire”. It’s massive gravitational field condenses everything to the point where atoms undergo nuclear fusion) So imagine something that is a hundred times more massive than our sun but all that matter is crammed into somethings the size of the earth, or smaller. That would really cause havoc on the velocities of matter approaching the object too. So, It’s the combination of crazy fast movement and condensing, which causes nuclear fusion, that causes the emitted light.
Now you might be wondering “but if that happens within the black hole, how does the light escape”? This might have been your original question. You were correct in saying the light going into the black hole does not escape, but the light we are seeing is not light that is from within the black hole. Look at the first and second images again, you see the label for “event horizon”. It is only beyond this point that light cannot escape. However, atoms are already undergoing nuclear fusion before they reach the event horizon and emitting light as a result. Thus, by the very definition of event horizon, this light produced is able to escape and enter our telescopes and our eyes. The gravitational field around a black hole is so much greater than that of our sun, it’s not surprising that we see so much light emitted from “black” holes. It may seem counter intuitive, but it’s what we observe and predict! It’s pretty cool if you ask me!
Thanks for the ask! :D
A beta particle (or electron) in a magnetic field.
The Titanboa: the scariest part about it is that it actually existed.
via A World So Great!
Thoughts about us.
Questions about the structure of the universe have always deeply bothered me.
I think it is because I wondered why I am who I am, and how easily I could be somebody else. What makes me different from him? Her? You?
Yes, there are so many things, but there amount of things that we have in common weigh so much more.
I think it is incredible, when people understand each other.
Had a nasty headache earlier so I took a nap and it was wonderful. But now I can’t sleep.
Hit me up on tumblr or twitter timuism
We can talk about nothing or anything
"For Neil Tyson, With all good wishes to a future astronomer" - Carl Sagan
This was one of our favorite moments from tonight’s episode. What did you love most about the new COSMOS?
On the first episode of Cosmos, Neil deGrasse Tyson starts the show on exactly the same cliff that Carl Sagan did over thirty years ago on the original & legendary Cosmos series.
Thats how you show respect ladies & gents.
(courtesy of @JPMajor on twitter)
#TheCoProduction 4: Recovery | 03.07.14 | Urban Art Gallery