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.

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• Andrea M. Ghez:

  There's a large cluster of stars that are orbiting the center of our galaxy. And by measuring the m

• Andrea M. Ghez:

  One of the key differences between galaxies with super massive black holes is whether or not the bl

• Andrea M. Ghez:

  One of the big mysteries about the black hole at the center of the galaxy is, 'Why don't we see emi

• Andrea M. Ghez:

  Proof of the black hole is a tremendous amount of mass inside a very small volume. There's 4 millio

• Andrea M. Ghez:

  The star S0-2 orbits around Sgr A* every 16 years and will go through its closest approach in 2018.

• Andrea M. Ghez:

  The question that I started off with was, I thought, very simple. It was just 'Is there a massive b

• Andrea M. Ghez:

  Astronomers are obsessed with building larger and larger telescopes. There are two promises that we

• Andrea M. Ghez:

  The atmosphere is great for people - it allows us to survive - but it's a real headache for astrono

• Andrea M. Ghez:

  We have this interesting problem with black holes. What is a black hole? It is a region of space wh

• Desiree Rogers:

  This ability to mix people together is something I learned early on.