News tagged with gravitational pull

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Spiral arms hint at the presence of planets

A new image of the disk of gas and dust around a sun-like star has spiral-arm-like structures. These features may provide clues to the presence of embedded but as-yet-unseen planets.

Oct 19, 2011
4.3 / 5 (6) 2

Dark matter mystery deepens

(PhysOrg.com) -- Like all galaxies, our Milky Way is home to a strange substance called dark matter. Dark matter is invisible, betraying its presence only through its gravitational pull. Without dark matter ...

Oct 17, 2011
4.7 / 5 (22) 30 | with audio podcast

Hubble survey carries out a dark matter census

(PhysOrg.com) -- The NASA/ESA Hubble Space Telescope has been used to make an image of galaxy cluster MACS J1206.2-0847. The apparently distorted shapes of distant galaxies in the background is caused by an ...

Oct 13, 2011
4.2 / 5 (6) 8 | with audio podcast

Evolved stars locked in fatalistic dance

White dwarfs are the burned-out cores of stars like our Sun. Astronomers have discovered a pair of white dwarfs spiraling into one another at breakneck speeds. Today, these white dwarfs are so near they make ...

Jul 13, 2011
4.7 / 5 (7) 5 | with audio podcast

First stars in universe were not alone

The first stars in the universe were not as solitary as previously thought. In fact, they could have formed alongside numerous companions when the gas disks that surrounded them broke up during formation, ...

Feb 04, 2011
4.7 / 5 (16) 4 | with audio podcast

Firms see tidal energy as wave of future

Moored in the channel, the little gray barge strains against a raging morning tide. The torrent soon will drain nearby rocky inlets and fishing harbors by 20 feet - as high as a two-story house - only to flood them again ...

Nov 25, 2010
3.5 / 5 (2) 2