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Andrea M Ghez Quotes
An ordinary black hole is thought to be the end state of a really massive star's life.
~ Andrea M. Ghez
Black
Black Hole
End
Hole
Life
Massive
Ordinary
Really
Star
State
Thought
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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.
~ Andrea M. Ghez
Actually
Associate
Astronomer
Black
Black Hole
Details
Finite
Get
Hole
I Can
Ignore
Lot
Massive
Scales
Size
Super
Things
Understand
Work
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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.
~ Andrea M. Ghez
Because
Been
Bigger
Building
Detail
Distortion
Follow
Follow Through
Hard
Larger
Make
More
Obsessed
Promise
Promises
Really
Second
See
Things
Through
Two
design
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Black holes are very exotic objects. Technically, a black hole puts a huge amount of mass inside of zero volume. So our understanding of the center of black holes doesn't make sense, which is a big clue to physicists that we don't have our physics quite right.
~ Andrea M. Ghez
Amount
Big
Black
Black Hole
Black Holes
Center
Clue
Exotic
Hole
Holes
Huge
Huge Amount
Inside
Make
Mass
Objects
Our
Physicists
Physics
Puts
Quite
Right
Sense
Technically
Understanding
Very
Volume
Which
Zero
design
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Fortunately, most things around the supermassive black hole are just going to go around it. They're going to orbit it. They don't actually get sucked in.
~ Andrea M. Ghez
Actually
Around
Black
Black Hole
Fortunately
Get
Go
Going
Hole
Just
Most
Orbit
Sucked
Things
design
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Gravity wins over all other known forces.
~ Andrea M. Ghez
Forces
Gravity
Known
Other
Over
Wins
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How do you observe something you can't see? This is the basic question of somebody who's interested in finding and studying black holes. Because black holes are objects whose pull of gravity is so intense that nothing can escape it, not even light, so you can't see it directly.
~ Andrea M. Ghez
Basic
Because
Black
Black Holes
Directly
Escape
Even
Finding
Gravity
Holes
How
Intense
Interested
Light
Nothing
Objects
Observe
Pull
Question
See
Somebody
Something
Studying
Whose
You
design
copy
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.
~ Andrea M. Ghez
Black
Black Hole
Call
Center
Exist
Exotic
Finding
Galaxy
Gives
Hole
Interested
Interesting
Like
Massive
Objects
Opportunity
Our
Prove
Really
Reason
Super
Us
Whether
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copy
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?'
~ Andrea M. Ghez
About
Big
Black
Black Hole
Center
Eating
Falling
Galaxy
Hole
Matter
Mysteries
Onto
Rather
See
Surroundings
Up
Why
design
copy
One of the key differences between galaxies with super massive black holes is whether or not the black holes are lit up, because they are basically bingeing on a lot of material in its surroundings.
~ Andrea M. Ghez
Basically
Because
Between
Black
Black Holes
Differences
Galaxies
Holes
Key
Lit
Lot
Massive
Material
Super
Surroundings
Up
Whether
design
copy
Our galaxy's pretty ordinary, garden-variety. So if we believe our galaxy has a super massive black hole, that tells us that most, if not all, galaxies host such a black hole at their centers.
~ Andrea M. Ghez
Believe
Black
Black Hole
Centers
Galaxies
Galaxy
Hole
Host
Massive
Most
Ordinary
Our
Pretty
Super
Tells
Us
design
copy
Proof of the black hole is a tremendous amount of mass inside a very small volume. There's 4 million times the mass of our sun within a region that's comparable to the size of our solar system.
~ Andrea M. Ghez
Amount
Black
Black Hole
Comparable
Hole
Inside
Mass
Million
Million Times
Our
Proof
Region
Size
Small
Solar
Solar System
Sun
System
Times
Tremendous
Tremendous Amount
Very
Volume
Within
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The atmosphere is great for people - it allows us to survive - but it's a real headache for astronomers.
~ Andrea M. Ghez
Atmosphere
Great
Headache
People
Real
Survive
To Survive
Us
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The Keck telescope, which is the largest in the world, had opened just before I began my faculty position at UCLA.
~ Andrea M. Ghez
Before
Began
Faculty
Had
Just
Largest
Opened
Position
Telescope
UCLA
Which
World
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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.
~ Andrea M. Ghez
Amount
Black
Black Hole
Hole
Key
Mass
Motions
Proving
Showing
Small
Stars
Tremendous
Tremendous Amount
Very
Volume
You
design
copy
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.
~ Andrea M. Ghez
Amount
Around
Black
Black Hole
Center
Galaxy
Hole
Key
Like
Mass
Motions
Moves
Much
Orbit
Planets
Proving
Showing
Small
Star
Stars
Sun
Tremendous
Tremendous Amount
Very
Volume
Way
You
design
copy
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.
~ Andrea M. Ghez
About
Always
Black
Black Hole
Center
End
Hole
I Love
Just
Love
Massive
Milky Way
New
Off
One Of The Things
Question
Questions
Science
Simple
Started
Things
Thought
Up
Very
Way
You
design
copy
The star S0-2 orbits around Sgr A* every 16 years and will go through its closest approach in 2018. That's an opportunity to test Einstein's General Relativity theory through very precise measurements of this star's short period orbit.
~ Andrea M. Ghez
Approach
Around
Closest
Einstein
Every
General
General Relativity
Go
Measurements
Opportunity
Orbit
Period
Precise
Relativity
Short
Short Period
Star
Test
Theory
Through
Very
Will
Years
design
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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.
~ Andrea M. Ghez
Black
Black Hole
Center
Central
Cluster
Figure
Galaxy
Hole
Large
Measuring
Motion
Our
Out
Particular
Stars
Whether
design
copy
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!
~ Andrea M. Ghez
Black
Black Hole
Black Holes
Confined
Density
Describing
Hole
Holes
Infinitely
Interesting
Large
Mass
Means
Problem
Really
Region
Space
Volume
Way
Where
Which
You
Zero
design
copy
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AuthorName
Andrea M. Ghez
Profession
Scientist
BirthDate
16 June, 1965
Country
United States
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