Celestia Forums

Called HD 149026b, the feverish world emits so much infrared heat that it glows slightly. "It would look like an ember in space, absorbing all incoming light but glowing a dull red," said study leader Joseph Harrington of the University of Central Florida. Planet of the Apes Series Extrasolar_Planet...

The Earth acts like a gyroscope in its orbit around the sun in that it maintains the direction of its spin axis in space. The implication of the conservation of angular momentum is that the angular momentum of the rotor maintains not only its magnitude, but also its direction in space in the absence...

A black hole is an object with a gravitational field so powerful that a region of space becomes cut off from the rest of the universe ?€“ no matter or radiation, including visible light, that has entered the region can ever escape. The lack of escaping electromagnetic radiation renders the inside of...

Twinkling in the sky is a diamond star of 10 billion trillion trillion carats, astronomers have discovered. The cosmic diamond is a chunk of crystallised carbon, 4,000 km across, some 50 light-years from the Earth in the constellation Centaurus. It's the compressed heart of an old star that was once...