Scientists using the Hubble Space Telescope have been able to detect the chemical signature of methane in the atmosphere of a planet orbiting a star 63 light-years away.

Dwarf planet 2012 VP-113 takes approximately 4,000 years to orbit the sun once. [11 mins. 55 secs.]

We'll hear about new work in the field of discovering exosolar planets -- including research that used the Hubble Space Telescope to take optical images of a planet orbiting a star some 25 light years away. [12 mins. 29]

In this segment, we'll get the big picture on science on the planet Mars. From orbiting observatories to roving rovers to the ditch-digging Phoenix -- what have planetary scientists learned about Mars, and what remains to be discovered?