Albert Einstein was fond of thought problems — ways to reason out the secrets of the universe through examples. More »
▚Featured Images
▶StarDate Radio: November 23 — General Relativity
In November of 1915, members of the Prussian Academy of Sciences in Berlin watched the universe change. More »
★Stargazing: November 23
Two birds wade low across the southern sky early tonight. They are the constellations Grus, the crane, and Phoenix, the firebird. They are best seen from the southern third of the country, with Grus standing a little taller than its cousin. More »
▶StarDate Radio: November 22 — Double Black Hole
Two giant black holes are helping to brighten things up in the center of a distant galaxy — made possible by a collision with a smaller galaxy. More »
★Stargazing: November 22
The faint constellation Monoceros, the unicorn, rises in late evening below much-brighter Orion. It is to the lower left of Orion’s Belt, a short line of three bright stars that rises straight up from the horizon. More »
★Stargazing: November 21
Look for the North Star, Polaris, tonight and every night. If you can’t find it, line up the stars at the outer edge of the Big Dipper’s bowl. Follow that line up and away from the bowl until you come to the first moderately bright star, Polaris. More »
★Stargazing: November 20
About four billion years ago, boulders as big as cities slammed into the Moon, blasting holes in its surface. The holes later filled with molten rock, which cooled to form dark volcanic plains, which form the dark features we see on the Moon today. More »
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Last Nov. 3, 6:24 am
New Nov. 11, 11:47 am
First Nov. 19, 12:27 am
Full Nov. 25, 4:44 pm
