A blackhole has been discovered by german astronomers in the center of our galaxy, the blackhole is four million times bigger than our sun. It is currently 27000 lightyears away from earth. http://blogs.discovermagazine.com/80...alaxys-center/
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A blackhole has been discovered by german astronomers in the center of our galaxy, the blackhole is four million times bigger than our sun. It is currently 27000 lightyears away from earth. http://blogs.discovermagazine.com/80...alaxys-center/
This is news? I thought they knew about it years ago.
Also, it's 4 million times more massive. It's probably quite small.
No they only "thought" it, and now they say they are 99.9% they are sure. Do some googling and it's being described as massive and monstrous.
According to my rough calculation, the Swartzchild radius should only be on the order of 1 light minute. That's what, the orbit of Mercury? Not that big.
Since when is the size of a hole limited to what is at the very bottom?Quote:
Originally Posted by drewmandan
Meaning...?Quote:
Originally Posted by Xaqaria
People. It is a supermassive black hole. It is not really a hole, but an object so large that its gravatational force is strong enough to suck light in.
Not large, massive.Quote:
Originally Posted by Half/Dreaming
A black hole is a singularity, the black space is the point of no return, from there not even light can escape from the hole.
Lol I love DreamHope's threads. :chuckle:
Blackhole's frighten me in the sense that I'd never see them coming.
Meaning a hole is usually measured by the area in which you could fall into. I would say this puts the real size of a black hole as measured by the area within the event horizon.Quote:
Originally Posted by drewmandan
Seriously, that's old news. The theory now is that every galaxy has a black hole in it's center.
They have suspected this for awhile. Many of them believe that there are black holes in the center of every galaxy.
This is very old news, the gravitational effects are plainly visible, they even have X-ray pictures of black holes in the centre of nearby galaxies, this is not new.
I seem to be confused by this...
Is the very center of our galaxy a black hole? Or is it around the center? I've always wondered what that giant light in the center was.
What giant light? The centre of most galaxies have an empty area, which is the horizon of the black hole, anything closer and the gravitation force becomes too strong for stars to stay in orbit.
If you're referring to the bloom that you see in the centre of galaxies through a telescope, it's just that you are looking through the most stars from that angle so the light compounds and makes it brighter.
IF you are talking about a quazar, those images aren't the visible light spectrum. As the super massive black holes in the core of the quazars pull in more debris the debris gets ripped apart at a subatomic level, which releases huge amounts of high energy radiation, which gets picked up with special telescopes.
Yeah, I'm talking about that bloom stuff or whatever in the center.
http://www.nasa.gov/images/content/2...ilkyway516.jpg
So that's really just where a black hole is? Is the black hole what makes our galaxy spin?
The Universe is amazing, earth is so big yet so small.
Does the Universe have boundries? It's incredible
According to physicists theoritcally the universe is expanding at the speed of light. Since nothing can travel faster than the speed of light, it is theoretically not possible to catch up with the edge of the universe.Quote:
Originally Posted by Jorge
Oh yeah that's right I remember reading that somewhere, after the supposed " Big Boom " it just kept going and going, and I also read it could eventually stop, and like reverse and get sucked back up? But I'm guessing that's in like billions of years later.
What's to come of us humans, it's so mind blowing.
The event horizon is, by definition, the boundary beyond which you can't escape.Quote:
Originally Posted by Xaqaria
Duality at a complex level.
Black Hole, Sun.
The black hole is invisible, that image appears to be a small galaxy in front of a large one, but the bloom is just because the stars there are in the highest concentration.Quote:
Originally Posted by slayer
Galaxies spin because if they didn't they would collapse into themselves. Black holes at the centres of galaxies are currently so massive that the laws of gravity don't actually work. They need to be modified for enourmous mass like a black hole, but so far no model has correctly fit it.
Galaxies should spin slower as they get further out, but they don't. The entire galaxy seems to spin in sync, it is the one major hole still remaining in the theory of gravity.
Not entirely true. Most galaxies have black holes at their centres, but there are galaxies called globular clusters, that are held together just by the gravity of the stars within it.Quote:
Originally Posted by The Cusp
I just realized that the only reason I'm into Astronomy is because I like looking at those pictures. I get lost in them.
Anybody here experienced with telescopes? I got this Celestron AstroMaster 114 that I bought some time ago, but having a helluva hard time getting it to set up right. I'm a little mad, I paid a hundred something dollars for this thing months ago and haven't successfully seen a single star (or the moon, which I am very excited to look) through this thing.
Yep, just like a toilet.Quote:
Originally Posted by slayer
http://www.fotosearch.com/bthumb/PDS...4/AA032163.jpg