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Asteroid family is as old as the Solar System itself

To date, astronomers haven't seen asteroid families (that is, asteroids with a common source) in the Solar System older than about 3 billion years -- well after the star system came to be 4.5 billion years ago.

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Asteroid family is as old as the Solar System itself

Todate,astronomershaven'tseenasteroidfamilies(thatis,asteroidswithacommonsource)intheSolarSystemolderthanabout3billionyears--wellafterthestarsystemcametobe4.5bi

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BeiDou to guide urban construction

NavigationsystemtoplaykeyroleinbuildingofadministrationcenterChina'sself-developedBeiDouNavigationSatelliteSystemwillseewiderapplicationinurbanconstruction,asaS

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Robot surgeon reduces HIV-infection risk in Beijing

HIVispassedonthroughbodilyfluidslikeblood,whichcanmakeitdangerousforsurgeonstocarryoutoperationsoninfectedpatients.Tocopewiththisdifficulty,TheGeneralHospitalof

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Potentially habitable planet found around nearest star: study

Researchers have found a planet orbiting the closest star to the Solar System, and it may be the closest possible home for life outside the Solar System, according to a study published online Wednesday in the journal Nature.