The Rosetta mission is at an end as the European Space Agency plans for a controlled descent into the surface of comet 67P;
This month Phil Plait teaches us about black holes and neutron stars in his Astronomy Crash Course series.
Joe Hanson discusses the problems of space junk, outdated orbital satellites, and the chain reaction called the Kessler Effect;
The Lowell Observatory talks about the re-aluminization of the large mirror of their telescope, explaining how and why it’s done;
Forty years ago, on July 20, 1976, Viking 1 became the first U.S. spacecraft to land on Mars. This year NASA’s Langley Research Center celebrated fortieth anniversary of this momentous achievement; and
Working with the British Antarctic Survey, ESA is studying how humans survive in conditions resembling a long duration mission on the Moon or Mars.