News tagged with kuiper belt

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City lights could reveal E.T. civilization

In the search for extraterrestrial intelligence, astronomers have hunted for radio signals and ultra-short laser pulses. In a new paper, Avi Loeb (Harvard-Smithsonian Center for Astrophysics) and Edwin Turner ...

Nov 03, 2011
4.6 / 5 (29) 54 | with audio podcast

The Edges of the Solar System

(PhysOrg.com) -- The solar system does not end abruptly past the planets. Beyond the orbit of Neptune, the outermost planet (it orbits the sun at a distance of 30 AU, where one AU is the average distance of ...

May 07, 2010
4.5 / 5 (24) 6 | with audio podcast

Giant planet ejected from the solar system

(PhysOrg.com) -- Just as an expert chess player sacrifices a piece to protect the queen, the solar system may have given up a giant planet and spared the Earth, according to an article recently published in ...

Nov 10, 2011
4.2 / 5 (21) 34 | with audio podcast

How many moons does Earth have?

Look up into the night sky and count the moons. You can see only one moon, "the" Moon. But does the Earth have any other moons? Around the Solar System, multiple moons are the rule. Jupiter has 67 natural ...

Jul 05, 2013
4.4 / 5 (19) 7

Astronomers open window into Europa's ocean

(Phys.org) —With data collected from the mighty W. M. Keck Observatory, California Institute of Technology (Caltech) astronomer Mike Brown—known as the Pluto killer for discovering a Kuiper-belt object ...

Mar 05, 2013
5 / 5 (11) 8 | with audio podcast