Search found 2 matches
- Sun Feb 10, 2008 9:25 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Abell 2218: A Galaxy Cluster Lens (APOD 10 Feb 2008)
- Replies: 21
- Views: 6689
Think of it this way: have a trampoline (so, this is a 2D example, but that's how you should see it in 3D) and put a basketball on it. You'll see that the ball will form a dip in the fabric of the trampoline. Now take a marble and let it pass the basketball at long distance, you'll see that it does ...
- Sun Feb 10, 2008 12:56 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Abell 2218: A Galaxy Cluster Lens (APOD 10 Feb 2008)
- Replies: 21
- Views: 6689
Why there are two images? That has to do with the way the light is bent around the mass. It's not like a normal lens you have in a camera or magnifier on Earth. The lens is somewhat more complicated and hence you get multiple images. http://en.wikipedia.org/wiki/Gravitational_lensing A second note: ...