The Sky Tonight

September 16, 2015

Study: 'Hot Jupiter' exoplanets formed extremely rapidly
Paris (UPI) Sep 16, 2015
For years, astronomers have been stumped by a rare type of exoplanet known as "hot Jupiters." Hot Jupiters are gas giants which orbit unusually close to their stars. Scientists have theorized that hot Jupiters form in the outer reaches of their solar systems and drift inward toward their host star - the opposite of the trajectory of the real Jupiter and most other gas giants. It's their arrival near their stars that makes them hot and causes their gas to expand to such a large size. Unt ... read more

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Scientists conduct most precise test of light speed The speed of light is a constant. A new test - the most precise test of a photon's speed - confirms it. ... more		NASA's SDO catches a double photobomb On Sept. 13, 2015, as NASA's Solar Dynamics Observatory, or SDO, kept up its constant watch on the sun, its view was photobombed not once, but twice. Just as the moon came into SDO's field of view o ... more		Under Saturnian moon's icy crust lies a 'global' ocean Cornell University researchers have learned that a global ocean lies beneath the moon's thick icy crust by measuring with precision the tiny wobbles of Saturn's moon Enceladus - whose cosmic quavers ... more
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