- What does our galaxy look like?
- How do stars orbit in our galaxy?
- How is gas recycled in our galaxy?
- Where do stars tend to form in our galaxy?
- Who is Andrea M. Ghez?
- What is the name of our galaxy?
- What is the ratio between the diameter and the thickness of the galactic disc?
- Is our galaxy rotating?
- Can our galaxy be seen at night far from cities?
- Why do we need satellites to detect gamma rays from our galaxy?
Hint: Check Wikipedia for Andrea M. Ghez
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Thursday, April 25, 2013
Quiz
LAURA SOTO
What does our galaxy look like?
-Our galaxy consists of a disk of stars and gas, with a bulge of stars at the center of the disk, surrounded by a large spherical halo.
How do stars orbit in our galaxy?
-Stars in the disk orbit in circles going in the same direction with a little up and down motion.
How is gas recycled in our galaxy?
-Gas from dying stars mixes new elements into the interstellar medium, which slowly cools, making the molecular clouds where stars come from.
Where do stars tend to form in our galaxy?
-Active star-forming regions contain molecular clouds, hot stars, and ionization mubulae.
Who is Andrea M. Ghez?
-Andrea Mia Ghez (born June 16, 1965) is an American astronomer and professor in the Department of Physics and Astronomy at UCLA.
What is the name of our galaxy?
-The Milky Way
What is the ratio between the diameter and the thickness of the galactic disc?
-the diameter is about 100 times as great as the thickness.
Is our galaxy rotating?
-Yes
Can our galaxy be seen at night far from cities?
-No, there is too much light around.
Why do we need satellites to detect gamma rays from our galaxy?
-because they have a short wavelength and lots of energy.
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