NASA's Hubble Space Telescope has discovered a tidal disruption event 300 million light years away. The donut shaped remains of a star were found around a hungry black hole. Credit: NASA's Goddard Spa ...
The Hubble Space Telescope has measured several of these standard candles. One in particular, the Cepheid variable star has ...
Whether your tools are a telescope, a pair of binoculars ... Be sure to examine the Moon at many different phases and on different days. Parts of the Moon near the edge of the disk come into view at ...