Galxies
What holds together galaxies?
Gravity
How many stars are in the Milky Way?
One (the Sun!)
Are black holes more or less heavy than the Sun?
MUCH more!
What happens to time in a black hole?
It slows down
What is in the center of most galaxies?
What is the violent explosion at the end of a star's life called?
A supernova!
Black holes are formed from...
Stars
Astrophysics combines which two fields...
Astronomy and Physics
What type of galaxy is the Milky Way?
A Spiral Galaxy
Stars are made of a gas called ____
Hydrogen
Sagittarius A
The moon does what to light?
Reflects!
Galaxies are usually found in ____?
Clusters
After a supernova, stars can become an object called a ____
Black Hole
What is the final "boundary" of a black hole called?
The Event Horizon
What is the fastest things in the universe?
Light!
Which type of galaxy is shaped like a flat disk, with a central bulge but no spirals?
Lenticular
The Sun will continue to shine for about _____ years
Several billion
If you get too close to a black hole, _____ happens
Spaghettification
Over time, gas in stars converts from hydrogen to which gas?
Helium