Weekly Space Hangout – December 13, 2013 – Europa’s Water Jets and Chinese Lunar Lander

by Fraser Cain on December 13, 2013

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Host: Fraser Cain
Guests: David Dickinson, Amy Shira Teitel, Jason Major, Nicole Gugliucci

David:
The Geminid meteors
China landing on the Moon
Space Station Coolant Issues

Fraser:
The Year in Space Calendar Giveaway on Universe Today
Kerbal Space Program game on sale on Steam TODAY!
UT’s Phases of the Moon App on iOS is FREE Monday, 12/16/2013

Jason:
Jets on Europa
Star not a star
Lakes on Titan

Amy:
Exoplanet with the biggest orbit

Nicole:
New Cosmoquest Android App – Earth or not Earth?
Molecular cloud M51

We record the Weekly Space Hangout every Friday at 12:00 pm Pacific / 3:00 pm Eastern. You can watch us live on Google+, Universe Today, or the Universe Today YouTube page.

About 

Fraser Cain is the publisher of Universe Today. He's also the co-host of Astronomy Cast with Dr. Pamela Gay.

Mickey December 14, 2013 at 12:37 PM

The extremely distant exo-planet that orbits it’s star at 650 AU must have an incredibly long orbital period. How do we know that the orbit isn’t elliptical and thus could have formed nearer its star. Seems like it would eliminate some of the objections to it’s existence.

magnus.nyborg December 15, 2013 at 7:44 AM

Even if formed near the star, and then ejected into an almost parabolic trajectory (a stretched ellipse limits the parabolic trajetory of escape), one would have to explain how it was ejected – and ejecting a 11 Mjup planet requires a similar amount of mass.
I doubt there is enough data on the orbit to determine anything at this point, so it might be a highyl elliptical orbit, or maybe not an orbit at all (rogue planet).

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