Group 2 Galaxies And Black Holes

a black hole is a scary place to be. it is a black hole because no light can escapee from it. Also if you went into the horizon of a black hole(the area around it) there is no way back out of it. Basically
a black hole is a region where gravity prevents anything escaping. A galaxy is a massive region which is held together with gravity. A galaxy is full of stars, planets and other things as well as gas and dust. The galaxy that the earth is in is called the milky way and there are 170 billion galaxies is our observable universe and possibly more in other universes.

ESO-VLT-Laser-phot-33a-07.jpg
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