In the history of human civilization humans looked up at the sky and saw light. Now we can listen to the very fabric of space and time.
Watching A Black Hole From Your Back Yard
It is possible to observe a black hole from the comfort of your back yard.
A Black Hole With Flare
Much of the light we observe from the region around a black hole is in the form of x-rays. Occasionally these x-rays will briefly flare up.
Black Holes: Now Available in Medium
Observationally we know that black holes come in two sizes: stellar mass black holes with a mass of 5 – 10 Suns, and supermassive black holes with a mass of millions or billions of Suns. What we haven’t seen are medium sized black holes with masses of hundreds to thousands of Suns. We’ve long suspected they should exist, but proving it has been difficult. Now there’s strong evidence that these medium-sized black holes actually exist.
Two Black Holes in a Gravitational Dance
In August I wrote about evidence of a binary supermassive black hole in the center of a galaxy. Now there’s news of another binary in a different galaxy.
Black Holes Tell No Tales. Or Do They?
Stephen Hawking thinks he’s solved a long standing problem in physics known as the information paradox. But has he?
Twin Giants
A supermassive black hole lurks in the center of our galaxy. But two supermassive black holes lurk in some galaxies.
How Does Gravity Escape a Black Hole?
Here’s the deal: nothing can travel faster than light. A black hole traps everything including light. So how does gravity escape a black hole?
Do Black Holes Really Exist?
There are some who would argue black holes haven’t yet been proven. In a way, they have a point.