Darkest planet ever discovered is a gas giant but reflects only 1 percent of the light falling on it. Scientists speculate an unknown chemical or gas is absorbing light.
Beginning of the end of the world: May 21st is what a California minister (with a considerable following) predicts. Scientists, for their part, consider the sun's 'habitable zone' in calculating when Earth will become toast.
If Tatooine had trees, would they be black? Scientists say that a planet with two suns might have black or gray plants, not green. Why is that?
The International Dark-Sky Association recognized Sark Island, which is about 80 miles off the south coast of England, for the quality of its night sky. Sark thus becomes the latest in a select group of dark sky places around the world, and the first island.
Every 27 million years, there is a much higher likelihood of a mass extinction. Some astronomers have proposed that these extinctions are caused by a small comet-disturbing star orbiting our sun, the so-called Nemesis hypothesis.
A new look at the data from one of the telescopes used to establish the existence of dark matter and dark energy raises questions about whether they really exist at all.
Astronomers spotted a 'supermassive' black hole – heavier than a billion suns – being ejected from a distant galaxy.