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Age is a big component for an Earthlike planet. Too old and cool, and the magnetic field is gone, thus allowing solar wind to wreak havok!
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Reflecting today on the fact that we're creeping towards 1000 discovered exoplanets. Only a few hundred billion more out there to discover..
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Water vapor in a planet's atmosphere = good for life. Carbon monoxide? Not as good. But still useful for science. http://bit.ly/Z7k2rd
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A cool thing about evaporating planets is that they trail massive plumes of gas as they are ripped off by their star. Yuck, cosmic entrails!
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HD189733b is one planet suffering atmospheric evaporation at the hands of its star pic.twitter.com/B9cajGk3ab
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Fun fact from exoplanet scientist Stephen Kane: Did you know that some planets are so close to their star that they are evaporating?
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Cosmic St. Patty's day celebration! Kepler, Jupiter, the moon, and Pan-STARRS are running with Taurus the bull. pic.twitter.com/JkTgFIQ42J
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Cosmic St. Patty's day celebration! Kepler, Jupiter, the moon, and Pan-STARRS are running with Taurus the bull. pic.twitter.com/JkTgFIQ42J
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How do planet-hunters use pi? Fractional dip in light when a planet transits a star = (Pi * r_planet^2)/(Pi * r_star^2)
#piday -
PlanetQuest proudly celebrates and endorses the celebration of Pi Day. Feel free to get irrational.
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Planetary Nurseries: ALMA will image protoplanets - exoplanets beginning to form around their stars
#ALMAlive http://on.fb.me/XvGlKl -
Props to
#project1640, possibly the coolest named exoplanet instrument, for spotting a 4-planet exo-system remotely! http://bit.ly/YelEiK -
Because planet-forming disks around brown dwarfs are low in mass, it is thought their planets are more likely to be terrestrial than gas
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Not a gas giant, not a star.Brown dwarfs are 13-80X mass of Jupiter, but too low in mass to fuse hydrogen as stars do http://on.fb.me/ZC2V22
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Closer stars may equal closer planets MT
@BadAstronomer Astronomers discover 3rd-closest stars to the Sun! http://slate.me/YTa3Wx -
One of the coolest
@NASAKepler discoveries has been that smaller planets seem to be the most common...good news for finding Earth-size exos. -
Kepler stares at 100,000 stars all day, every day. So far it's found over 100 exoplanets and nearly 3k exoplanet candidates.
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Congratulations
@NASAKepler – 4 years of mind-blowing exoplanet discoveries. Here's to many more! -
Trapexoid: this artist sees exoplanets in ordinary objects http://bit.ly/106OH7U
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