Two astronauts aboard the ISS conducted their fourth and final spacewalk to finish a series of repairs aimed at extending the functioning of a cosmic ray detector attached to the spacecraft.
Decades ago, Armenian scientists built a high-elevation trap to catch and study cosmic rays. Physics has mostly moved on, but the station persists—a ghost observatory with a skeleton crew.
Maria Goeppert Mayer left an indelible stamp on the history of physics. Now the US Postal Service has honored the nuclear physicist with a stamp of her own.
Would you walk 10,000 steps for a piece of glass the size of a deck of cards? What if that piece of glass were part of an astrophysics experiment to warn people about potentially deadly asteroids zooming toward Earth and make a 3D map of the universe?