NASA telescope looks at gamma-ray mysteries, A

This was a busy week for space news watchers. The GLAST gamma-ray space observatory blasted off, the International Astronomical Union dubbed dwarf planets “plutoids” in honor of the once-planet Pluto, and the Phoenix Mars Lander scooped up Martian dirt. The Takeaway goes behind these headlines with astrophysicist Neil deGrasse Tyson, director of the Hayden Planetarium and host of NOVA ScienceNOW.