This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: enhance the gravity within them, star formation in triggered. The constant gravitational flow and pull allows the stars to hold the spiral arms together. 16.) Sagittarius A-star or Sgr A* is the exact center of the galaxy. It was believed that it contained a few million solar masses, but observations show that there are not nearly enough stars in this region to account for so much mass, so that’s where they get the idea of a massive black hole....
View Full Document
- Spring '08
- Black hole, spiral arms, Sgr, Draw simple sketches