Pegasus, a constellation in the Northern Hemisphere. It is clearly visible in the autumn during the early evening. Pegasus lies between the constellations Andromeda and Aquarius. It contains part of the Great Square, a figure composed of four bright stars. The brightest star in the Great Square. Alpheratz, was originally part of Pegasus, but is now included in Andromeda.
Until recently, most people assumed that if Mars had liquid water, it no longer did and hadn't for quite some time. But scientists have recently noticed some anomalies in photos of Mars that may suggest there is water. Could there be life, too?
Hundred of meteors fly across the sky every night, but only a few make it to Earth. Meteors are best known for the brilliant streaks of light they make as they burn up in the atmosphere. Learn about 10 memorable meteor crashes that left an impression.