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A 53-hour Chandra observation of the central region of the Perseus galaxy cluster has revealed wavelike featuresthat appear to be sound waves.
Black Hole Sound Waves

Astronomers using NASA's Chandra X-ray Observatory have found, for the first time, sound waves from a supermassive black hole. The 'note' is the deepest ever detected from any object in our Universe. ...
Comet Borrelly as Seen By Deep Space 1
Stars With Long Hair

Throughout history, people have been both awed and alarmed by comets, stars with 'long hair' that appeared in the sky unannounced and unpredictably. We now know that comets are dirty-ice leftovers fro ...

What Is Polarimetry?

Polarimetry is the technique of measuring the 'polarization' of light. Most of the light we encounter every day is a chaotic mixture of light waves vibrating in all directions. Such a combination is k ...

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