Adjective
relating to any region of outer space outside our solar system
NASA will fly the International Space Station until 2020. It will also begin developing a rocket for deep-space exploration, ventures that will include trips to asteroids and, eventually, Mars.
Paola Antonelli, a senior curator at the MOMA, explains why she's delighted to challenge preconceived ideas about art and galleries. When she announced the acquisition of 14 video games in 2012, "all hell broke loose."
Six new national natural landmarks were designated by U.S. Secretary of the Interior Ken Salazar, helping develop a "conservation ethic for the 21st century."