Cassiopeia
Cassiopeia News
science
Clumpy-looking supernova remnant Tycho captured by NASA's Chandra X-ray Observatory
Did the explosion itself cause this clumpiness, or was it something that happened afterward?
science
NASA's Fermi spots pulsar zipping through space at 4 million kilometres an hour
Pulsars are super dense, rapidly spinning neutron stars left behind when a massive star explodes.