One hundred years ago this month, Albert Einstein published his theory of general relativity, one of the most important scientific achievements in the last century.
Nov 23, 2015 in Astronomy
One of the most recognizable constellations in the sky is Orion, the Hunter. Among Orion's best-known features is the "belt," consisting of three bright stars in a line, each of which can be seen without a telescope.
Nov 12, 2015 in Astronomy