"Professor Goddard does not know the relation between action and reaction and the need to have something better than a vacuum against which to react. He seems to lack the basic knowledge ladled out daily in high schools."
--1921 New York Times editorial about Robert Goddard's revolutionary rocket work.

"Correction: It is now definitely established that a rocket can function in a vacuum. The 'Times' regrets the error."
NY Times, July 1969.

— New York Times

Chandra X-Ray Obsrvatory

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Chandra Photo Album :: Recent Discoveries
Updated: 11 hours 4 min ago

Famous Black Hole Has Jet Pushing Cosmic Speed Limit

Mon, 01/06/2020 - 12:00pm
These images show evidence from NASA's Chandra X-ray Observatory that the black hole in the galaxy M87 is blasting particles out at over 99% the speed of light.
Categories: Astronomy

NASA's Great Observatories Help Astronomers Build a 3D Visualization of Exploded Star

Sun, 01/05/2020 - 12:00pm
Astronomers and visualization specialists from NASA's Universe of Learning program have combined X-ray, visible, and infrared wavelengths to create a 3D representation of the dynamic Crab Nebula.
Categories: Astronomy