In March, NASA officials revealed updated plans for a small space station near the Moon called the Deep Space Gateway. Anatoly Zak reports the plans threw a monkey wrench into years-long planning efforts by NASA’s international partners.
The Space Launch System and Orion won't fly until 2019, and NASA is sticking with its original plan not to include astronauts for the maiden mission. Here is a timeline of some of the programs' major twists and turns over the years.
Tonight, a four-person crew will seal themselves inside a three-story habitat at NASA's Johnson Space Center, kicking off a simulated 45-day mission to an asteroid. One crewmember shares his thoughts before entering.