In the Same Orbit, but on Different Planets
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In the radio industry, Sirius Satellite Radio chief executive Mel Karmazin is like Bono or Prince or Charo: One name is sufficient. Say "Mel," and everyone knows who you're talking about.
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Earth-like planets orbiting other stars may be far more common than had once been thought, a study suggests.
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A new class of planets has been found orbiting stars besides our sun, in a possible giant leap forward in the search for Earth-like planets that might harbor life, scientists said on Tuesday.
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Planet-building is dusty work, and now two space telescopes have captured images of cosmic construction materials: disks of dust circling stars about the same size as our sun.
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Most of the extrasolar planets discovered to date are gas giants like Jupiter, but their orbits are either much closer to their parent stars or are highly eccentric. Planet hunters are on the verge of confirming the discovery of Jupiter-size planets with Jupiter-like orbits. Solar systems that contain these "good" Jupiters may harbor habitable Earth-like planets as well.
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A pair of robots named ASTRO and NextSat have been working together in Earth orbit, docking, undocking, flying around and refueling, as if they have minds of their own.  Their adventures may herald a revolution in the way we explore space.
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Among a batch of new planets, found by the Hubble telescope on a small patch of sky in Sagittarius, are as many as five that orbit their home stars in less than a day.
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While the exploration of the Moon and other planets in our solar system is&nbsp;exciting, the first task for astronauts and robots alike is to actually&nbsp;get to those destinations.
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Itâs that time of year on the distant planet â when its ring system appears edge-on to observers on Earth.
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Astronomers announce recent discoveries of two Earth-like planets.
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A group of European-led    astronomers has made a photograph of what appears to be a planet orbiting another    star. If so, it would be the first confirmed picture of a world beyond our solar    system.
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The Messenger spacecraft got a quick glance at the solar systemâs innermost planet, which it eventually will orbit.
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Flip a coin. Heads, Earth is a common sort of planet. Tails, and ours is as unusual as a coin landing on edge. That's about the state of knowledge for scientists who ponder the question of our planet's rarity.
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European scientists have found a planet circling a distant star that could be home to life. The planet, the first detected so far that is enough like Earth for life to develop, orbits a star called mu Arae in the southern constellation Altar.
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A nearby star thought to harbor comets and asteroids now appears to be home to planets, too. The presumed worlds are smaller than Jupiter and could be as tiny as Pluto, new observations suggest.
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One pole of the sun is cooler than the other. That's the surprising conclusion announced today by scientists who have been analyzing data from the ESA-NASA Ulysses spacecraft.
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SPACE.com / To most common terrestrial dwellers, there's no place like Earth. But new simulations show that many Earth-like planets might exist outside of our solar system.