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New Views of a Feeding Black Hole.


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New Views of a Feeding Black Hole

Image credit: NASA
A team of Astronomers have discovered a cold ring of gas around a supermassive black hole in the heart of a distant quasar galaxy. Gas whirls around the heart of the Galaxy before finally plunging in. This process generates tremendous heat and light, and probably is the reason why quasars are so bright - more than a trillion suns.

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Jan 9, 2003, 11:59pm

Astronomy

Hubble Spots Earliest Bright Objects

Image credit: Hubble
The most recent photos released from the Hubble Space Telescope show objects so old they might be from a time when stars in the universe were just starting to shine in significant numbers - about 13 billion years ago. These objects are at the limit of Hubble's resolving power, but the next generation James Webb Space telescope is expected to see the entire group of proto-galaxies, and look back even further.

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Jan 9, 2003, 11:49pm

Gravity Moves at the Speed of Light

Image credit: NRAO
Theorized by Einstein for almost a century, physicists have found evidence to support the theory that the force of gravity moves at the speed of light. The speed was measured by physicist Sergei Kopeikin by watching how light from a distant quasar was bent by Jupiter's gravity. Variations in how the image of the quasar was bent accounted for this speed of gravity.

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Jan 9, 2003, 10:27pm

Neptune Has a Trojan

Image credit: NASA
Astronomers have discovered a new object which shares a very similar orbit with Neptune. Part of a classification of objects called Trojans, 2001 QR322 is 230 km across and requires 166 years to orbit the Sun. Although clusters of Trojans have been found following Jupiter's orbit, none have ever been found to share an orbit with any other giant planet; although, they've been predicted for years.

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Jan 9, 2003, 10:13pm




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