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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.
~ 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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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
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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
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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
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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
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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
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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
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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
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I think you can say that life is a system in which proteins and nucleic acids interact in ways that allow the structure to grow and reproduce. It's that growth and reproduction, the ability to make more of yourself, that's important.
~ Andrew H. Knoll
Ability
Allow
Grow
Growth
I Think
Important
Interact
Life
Life Is A
Make
More
Proteins
Reproduce
Reproduction
Say
Structure
System
Think
Ways
Which
You
Yourself
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If you look at the ecological circuitry of this planet, the ways in which materials like carbon or sulfur or phosphorous or nitrogen get cycled in ways that makes them available for our biology, the organisms that do the heavy lifting are bacteria.
~ Andrew H. Knoll
Available
Bacteria
Biology
Carbon
Ecological
Get
Heavy
Lifting
Like
Look
Makes
Materials
Organisms
Our
Planet
Them
Ways
Which
You
design
copy
It's fair to say when you go out and walk in the woods or on a beach, the most conspicuous forms of life you will see are plants and animals, and certainly there's a huge diversity of those types of organisms, perhaps 10 million animal species and several hundred thousand plant species.
~ Andrew H. Knoll
Animal
Animals
Beach
Certainly
Conspicuous
Diversity
Fair
Forms
Go
Huge
Hundred
Life
Million
Most
Organisms
Out
Perhaps
Plant
Plants
Plants And Animals
Say
See
Several
Species
Those
Thousand
Types
Walk
Will
Woods
You
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A lot of the game of AI today is finding the appropriate business context to fit it in. I love technology. It opens up lots of opportunities. But in the end, technology needs to be contextualized and fit into a business use case.
~ Andrew Ng
AI
Appropriate
Business
Case
Context
End
Finding
Fit
Game
I Love
In The End
Lot
Lots
Love
Needs
Opens
Opportunities
Technology
Today
Up
Use
design
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A lot of the progress in machine learning - and this is an unpopular opinion in academia - is driven by an increase in both computing power and data. An analogy is to building a space rocket: You need a huge rocket engine, and you need a lot of fuel.
~ Andrew Ng
Academia
Analogy
Both
Building
Computing
Data
Driven
Engine
Fuel
Huge
Increase
Learning
Lot
Machine
Need
Opinion
Power
Progress
Rocket
Space
Unpopular
You
design
copy
A single neuron in the brain is an incredibly complex machine that even today we don't understand. A single 'neuron' in a neural network is an incredibly simple mathematical function that captures a minuscule fraction of the complexity of a biological neuron.
~ Andrew Ng
Biological
Brain
Captures
Complex
Complexity
Even
Fraction
Function
Incredibly
Machine
Mathematical
Network
Simple
Single
Today
Understand
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AI has been making tremendous progress in machine translation, self-driving cars, etc. Basically, all the progress I see is in specialised intelligence. It might be hundreds or thousands of years or, if there is an unexpected breakthrough, decades.
~ Andrew Ng
AI
Basically
Been
Breakthrough
Car
Decades
Etc
Has-Been
Hundreds
I See
Intelligence
Machine
Making
Might
Progress
See
Thousands
Thousands Of Years
Translation
Tremendous
Unexpected
Years
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