Phrase by 'Andrea M. Ghez'
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I'm interested in finding whether or not there is a really massive, what we like to call 'super massive' black hole at the center of our galaxy. And the reason this is interesting is that it gives us an opportunity to prove whether or not these exotic objects really exist.
Author: Andrea M. Ghez - American ScientistBlack , Interesting , Opportunity , Finding , Prove
An ordinary black hole is thought to be the end state of a really massive star's life.
Author: Andrea M. Ghez - American ScientistLife , Black , End , Thought
As an astronomer, I get to ignore the details of the things that we don't understand. There's a lot of work that we can do on scales that we do understand, and there is actually a finite size that I can associate with a super massive black hole.
Author: Andrea M. Ghez - American ScientistWork , Black , Understand , Ignore
The key to proving that there's a black hole is showing that there's a tremendous amount of mass in a very small volume. And you can do that with the motions of stars. The way the star moves around the center of the galaxy is very much like the way the planets orbit the sun.
Author: Andrea M. Ghez - American ScientistYou , Black , Stars , Sun
There's a large cluster of stars that are orbiting the center of our galaxy. And by measuring the motion of stars, and in particular, their orbits, we can figure out whether or not there's a central black hole.
Author: Andrea M. Ghez - American ScientistBlack , Stars , Out , Galaxy
One of the big mysteries about the black hole at the center of the galaxy is, 'Why don't we see emission from matter falling onto the black hole, or, rather, the black hole eating up its surroundings?'
Author: Andrea M. Ghez - American ScientistSee , Black , Eating , Matter
The question that I started off with was, I thought, very simple. It was just 'Is there a massive black hole at the center of the Milky Way?' But one of the things I love about science is that you always end up with new questions.
Author: Andrea M. Ghez - American ScientistLove , You , Science , Simple
Astronomers are obsessed with building larger and larger telescopes. There are two promises that we make with bigger telescopes: that they can see fainter things and that they see more detail. But it's been really hard to follow through on that second promise because of atmospheric distortion.
Author: Andrea M. Ghez - American ScientistSee , Hard , Detail , Building , Promises
The atmosphere is great for people - it allows us to survive - but it's a real headache for astronomers.
Author: Andrea M. Ghez - American ScientistPeople , Great , Real , Survive
We have this interesting problem with black holes. What is a black hole? It is a region of space where you have mass that's confined to zero volume, which means that the density is infinitely large, which means we have no way of describing, really, what a black hole is!
Author: Andrea M. Ghez - American ScientistYou , Black , Space , Problem
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