NGC 7538 is an emission nebula that lies not far from the Bubble Nebula in Cassiopeia, about 9,100 light years away. It has an apparent size of about 8′ x 7′ (the full moon is about 30′ across). NGC ...
NASA has awarded a $20.5M contract to Johns Hopkins Applied Physics Laboratory to develop Suprathermal Ion Sensors under NOAA's Space Weather Next Programme. The sensors will play a pivotal role in ...