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. ...

Apr 22, 2014
5 / 5 (3) 1

Explainer: Light-years and units for the stars

"Space is Big. Really Big." The Hitchhiker's Guide to the Galaxy pretty much nailed space with those five words. And space is so really big that our earthly measures of distance struggle.

Aug 21, 2013
4.8 / 5 (11) 17

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 ...

Jul 15, 2011
5 / 5 (1) 0

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 ...

Jun 22, 2011
4.9 / 5 (8) 20 | with audio podcast

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.

Apr 18, 2011
not rated yet 2 | with audio podcast

X-Ray observations of an extrasolar planetary system

(PhysOrg.com) -- The majority of extra-solar planets (about 278 of them) are more massive than Jupiter. About 20% of this majority group orbit their stars at a distances of less than one-tenth of an astronomical ...

Oct 22, 2010
4.7 / 5 (12) 0 | with audio podcast