The year 2015 is packed full of amazing astronomical sights in the daytime and nighttime sky, from solar and lunar eclipses to dazzlingly bright planets. See our list of the 9 best stargazing events of the year.
Rock Layers: Timeline of Life on EarthEvolution is a complicated subject. While everybody understands that black bears are related to grizzly bears and we can even figure they are related to extinct bears, lots of people wonder how scientists can be so su
The Solar System consists of the Sun and the astronomical objects gravitationally bound in orbit around it, all of which formed from the collapse of a giant molecular cloud approximately billion years ago. of the system’s mass is in the Sun.