News tagged with astronomical unit

How far are the planets from the Sun?

The eight planets in our solar system each occupy their own orbits around the Sun. They orbit the star in ellipses, which means their distance to the sun varies depending on where they are in their orbits. ...

dateApr 22, 2014 in Space Exploration
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Comet Hartley 2 leaves a bumpy trail

New findings from NEOWISE, the asteroid- and comet-hunting portion of NASA's Wide-field Infrared Survey Explorer mission, show that comet Hartley 2 leaves a pebbly trail as it laps the sun, dotted with grains ...

dateJul 15, 2011 in Space Exploration
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The X-Ray Puzzle of Protostellar Jets

(PhysOrg.com) -- A new star develops by accreting material from a circumstellar disk; both in turn are embedded in a much larger, more nearly spherical envelope of in-falling dust and gas. The protostar is ...

dateJun 22, 2011 in Astronomy
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Imaging a multiple star

(PhysOrg.com) -- Multiple stars - binaries, triplets, or perhaps more stars, that orbit each other - are unique laboratories into the interactions between stars and their early environments.

dateApr 18, 2011 in Astronomy
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