Ask Ethan #9: Why everything rotates

“Galileo got it wrong. The Earth does not revolve around the Sun. It revolves around you and has been doing so for decades. At least, this is the model you are using.” –Srikumar Rao It’s the end of the week, so that means its time to take on another one of your questions from the … Read moreAsk Ethan #9: Why everything rotates

Measure the Tilt of the Earth on the Solstice! (This Wednesday!)

“Soon the earth will tilt on its axis and begin to dance to the reggae beat to the accompaniment of earthquake. And who can resist the dance of the earthquake, mon?” –Peter Tosh Every year, there are two special days where every place on Earth receives the same amount of sunlight — 12 hours — … Read moreMeasure the Tilt of the Earth on the Solstice! (This Wednesday!)

How long does a Solar Eclipse last?

“The moon shuts off the beams of the sun as it passes across it, and darkens so much of the earth as the breadth of the blue-eyed moon amounts to.” -Empedocles, ~450 B.C. Less than two weeks ago, I saw my first annular eclipse, with some spectacular results at the moment of maximum eclipse. This … Read moreHow long does a Solar Eclipse last?