Astronomy Picture of the Day · January 19, 2001

Black Holes Are Black

The Astronomy Picture of the Day for January 19, 2001 is “Black Holes Are Black,” an image. It is credited to Credit: M. Garcia , J. McClintock, R. Narayan, S. Murray ( CfA ), P. Callanan ( University College , Cork, Ireland) Illustration Credit: M. Weiss, CXC. The original explanation runs about 207 words.

From the explanation

“Q: Why are black holes black? A: Because they have an event horizon .”

— APOD editors, January 19, 2001

Read the full explanation on science.nasa.gov

At a glance

Date: January 19, 2001
Type: Image
Credit: Credit: M. Garcia , J. McClintock, R. Narayan, S. Murray ( CfA ), P. Callanan ( University College , Cork, Ireland) Illustration Credit: M. Weiss, CXC
Copyright: No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length: About 207 words