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Mars Base

Kepler finds first multi-planet system around a binary star - 0 views

phys.org/...-multi-planet-binary-star.html

scibyte61 exoplanets

shared by Mars Base on 29 Aug 12 - No Cached
  • NASA's Kepler mission has found the first multi-planet solar system orbiting a binary star
  • proves that whole planetary systems can form in a disk around a binary star
  • binary star in question is called Kepler-47
  • ...9 more annotations...
  • primary star is about the same mass as the Sun, and its companion is an M-dwarf star one-third its size
  • inner planet is three times the size of Earth and orbits the binary star every 49.5 days
  • outer planet is 4.6 times the size of Earth with an orbit of 303.2 days.
  • outer planet is the first planet found to orbit a binary star within the "habitable zone,"
  • the planet's size (about the same as Uranus) means that it is an icy giant, and not an abode for life
  • "The challenging thing is that this is a very faint star," Endl said, "about 6,000 times dimmer than can be seen with the naked eye."
  • The secondary star is too faint to measure
  • taking spectra of the system
  • These values, along with the Kepler eclipse and transit timings, were plugged into a model that calculated the relative sizes of all the bodies involved
Mars Base

A Crescent Moon in the Martian Sky - 0 views

www.universetoday.com/...escent-moon-in-the-martian-sky

scibyte65 Curiosity

shared by Mars Base on 26 Sep 12 - No Cached
  • raw image taken on September 21 by Curiosity’s right Mastcam shows a daytime view of the Martian sky with a crescent-lit Phobos
  • image
  • is a crop of the original, contrast-enhanced and sharpened
  • ...2 more annotations...
  • 13-km-wide Phobos has been spotted several times before by Mars rovers
  • most recently during a solar transit on September 13 (sol 37)
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