The 18 segments of the James Webb Space Telescope's primary mirror are fully aligned and working as a single 21-ft-dia. mirror as designed, NASA announced on March 16. NASA's first Space Launch System rocket rolled out to the launchpad at Kennedy Space Center on March 17 for a fueling test in advance of a planned launch this spring. The European Space Agency has suspended cooperation with Russia's Ros-cosmos on the ExoMars 2022 rover and launched a fast-track study of options to implement the mission. Russia is to stop supplying RD-181 engines, used on Northrop Grumman's Antares rocket, to the U.S. in retaliation for sanctions imposed in response to its invasion of Ukraine.
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