Issues with your account? Bug us in the Discord!
Some more news...
The Cabl3 Guy
Elite Ranger
in Zocalo v2.0
[url]http://www.space.com/scienceastronomy/blackhole_milkyway_021016.html[/url]
SO IT IS A BLACK HOLE WHO KNEW? EINSTEIN THATS THE ANSWER!
SO IT IS A BLACK HOLE WHO KNEW? EINSTEIN THATS THE ANSWER!
Comments
That star (S2) is probably dead and inside the black hole by now...
:p
We're seeing stuff that happened thousands or millions of years ago...
:)
[B]We're seeing stuff that happened thousands or millions of years ago...:) [/B][/QUOTE]
Actually only about 30 000 years ago.
Distinstace from Milky way's center to our solar system is little under 30 000 light years.
[B]Actually only about 30 000 years ago.
Distinstace from Milky way's center to our solar system is little under 30 000 light years. [/B][/QUOTE]
yeah, I knew it was in there somewhere! :p
Still 30,000 years is enough time for something to have already happened to S2 by now, considering it's orbit is on the scale of decades...
;)
[B]What about time dilation? [/B][/QUOTE]
That only comes into play when you're talking about fast-moving objects. While that star [i]is[/i] moving fast, it's still only going about 1.7% of the speed of light. Relativity hasn't even begun to come into play yet.
[B]Oohh scarey. So is it really in the heart, the centre of our galaxy?! Perhaps thats what spins the galaxy round in the first place. And you'd think it wouldn't take long til it sucked more and more stars til it got to us. [/B][/QUOTE]
That's not how a black hole works, despite popular myth. As long as you're outside the event horizon (the place where the speed needed to escape the gravity well becomes greater than the speed of light, not the horror movie) it acts just like a normal object with the same mass. Which is why the galaxy spins, as you mentioned. Without that orbit around the center, we'd fall right in. In the same vein, if Earth or one of the other planets suddenly stopped revolving around the sun, it would fall in as well.
But, since we [i]are[/i] orbiting at the right speed, we'll just keep going 'round and 'round until something screws it all up.
Yes, I'm looking at [i]you[/i], Andromeda Galaxy. ;)
[B]That only comes into play when you're talking about fast-moving objects. While that star [i]is[/i] moving fast, it's still only going about 1.7% of the speed of light. Relativity hasn't even begun to come into play yet. [/B][/QUOTE]
Actually gravity may have a greater opposing-dialation effect in this case in essence causing the reletive time to speed up, no slow down.
Jake
[B]Yes, I'm looking at [i]you[/i], Andromeda Galaxy. ;) [/B][/QUOTE]
If only galactic collisions happened a little faster. It'd be great to see one happen (provided the Milky Way wasn't involved). :D
[B]If only galactic collisions happened a little faster. It'd be great to see one happen (provided the Milky Way wasn't involved). :D [/B][/QUOTE]
right, let's build a remote control for the universe with a fast forward button!:D
[B]Actually gravity may have a greater opposing-dilation effect in this case in essence causing the reletive time to speed up, no slow down.
Jake [/B][/QUOTE]
I've certainly never heard of such an effect. If anything, I'd expect gravity to [i]amplify[/i] time dilation, not oppose it.
And why can't anyone else spell "dilate" correctly? I keep having to correct your quotes....
BTW if you want an excellent reasource for all things physics, take a look here: [URL=http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html]Hyperphysics[/URL]. Great site, lots of straight-forward, plain english explinations, along with equations.
Jake
[B]That's not how a black hole works, despite popular myth. As long as you're outside the event horizon (the place where the speed needed to escape the gravity well becomes greater than the speed of light, not the horror movie) it acts just like a normal object with the same mass. Which is why the galaxy spins, as you mentioned. Without that orbit around the center, we'd fall right in. In the same vein, if Earth or one of the other planets suddenly stopped revolving around the sun, it would fall in as well.
[/B][/QUOTE]
Looks like I been watching too many movies as you say. ;) That black hole film in particular ended up sucking in the Earth and everything in site.
So am guessing that all galaxies have black holes? And assuming this are there any other black holes that aren't in the centre of galaxies? :)