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Search results for planetesimals

Astronomy Apr 23, 2014

A star's early chemistry shapes life-friendly atmospheres

Born in a disc of gas and rubble, planets eventually come together as larger and larger pieces of dust and rock stick together. They may be hundreds of light-years away from us, but astronomers can nevertheless watch these ...

Space Exploration Apr 17, 2014

Vitamin B3 might have been made in space, delivered to Earth by meteorites

Ancient Earth might have had an extraterrestrial supply of vitamin B3 delivered by carbon-rich meteorites, according to a new analysis by NASA-funded researchers. The result supports a theory that the origin of life may have ...

Astronomy Mar 27, 2014

Astronomers looking for clues to water's origins

A gas and dust cloud collapses to form a star. Amid a whirling disc of debris, little bits of rock coated with liquid water and ice begin to stick together. It is this stage of a star's formation that astronomers hope to ...

Space Exploration Feb 28, 2014

How Earth was watered

Early Earth's accidental deluge via water-carrying comets has long been a stumbling block for those interested in life on other planets.

Space Exploration Jan 31, 2014

Explosive volcanoes light up Mercury's deep past

Mercury has long been a mystery to scientists. Until recently, knowledge of the planet was limited to the grey, patchy landscape revealed by the Mariner 10 probe, NASA's first mission to Mercury in the mid-1970s.

Astronomy Jan 17, 2014

Some planet-like Kuiper belt objects don't play "nice"

The Kuiper belt—the region beyond the orbit of Neptune inhabited by a number of small bodies of rock and ice—hides many clues about the early days of the Solar System. According to the standard picture of Solar System ...

Astronomy Dec 3, 2013

How abundant are Super-Earths?

Our solar system hosts a cornucopia of worlds, from the hellfire of Venus to the frozen plains of Mars to the mighty winds of Uranus. In that range, the Earth stands alone, with no planet coming close to its life-friendly ...

Astronomy Oct 24, 2013

A rare snapshot of a planetary construction site

(Âé¶¹ÒùÔº) —Planets are formed in disks of gas and dust around nascent stars. Now, combined observations with the compound telescope ALMA and the Herschel Space Observatory have produced a rare view of a planetary construction ...

Space Exploration Sep 25, 2013

Moon is younger than first thought

Improved age data for the Moon suggests that it is much younger than previously believed according to scientists presenting at a Royal Society discussion meeting entitled Origins of the Moon this week (23 September). Professor ...

Space Exploration Jul 8, 2013

Potential solution to meteorite mystery: Chondrules may have formed from high-pressure collisions in early solar system

(Âé¶¹ÒùÔº) —A normally staid University of Chicago scientist has stunned many of his colleagues with his radical solution to a 135-year-old mystery in cosmochemistry. "I'm a fairly sober guy. People didn't know what to ...

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