Overview

Image courtesy of nasa.gov

Say Hello To Sagittarius A*

The above image is a picture of the center of the Milky Way galaxy taken from x-ray detection by the Chandra X-Ray Observatory. Sagittarius A*, the object zoomed in on, is believed to be the black hole that resides at the center of our galaxy. The behavior of this object matches everything we would expect about a black hole (things we will cover in this section).


Things to remember about black holes:

  1. There are several different ways to form a black hole.
  2. At their heart is a “singularity”, which is hidden by something called an event horizon. No data can be retrieved from inside the event horizon.
  3. Space-Time around a black hole can get…interesting.
  4. Black holes can emit something called “gravitational waves”, which are waves upon the “fabric” of Space-Time itself.

SO THERE IS A BLACK HOLE AT THE CENTER OF OUR GALAXY? BUT WHAT ARE THESE THINGS ANYWAYS?

What are they?