January 27th, 2015
First Quarter Moon
Seth Jarvis

Let’s play Earthball

Cy Davis asked, “If we were to make an exact duplicate of a waterless earth the size of let’s say a basketball… would it roll like a sphere? I don’t think so. So my question is… Was the earth ever…

Robert Bigelow

Greatest elongation times two

Now is the time to see Venus and Mercury! Venus is at greatest elongation on Saturday, January 8 and Mercury is at greatest elongation on Sunday, January 9.

Robert Bigelow

A 23 Hour Day

Yes, Daylight Saving Time is upon us. For most of the United States, on March 14, 1:59 a.m. will be followed by 3:00 a.m. as clocks are officially set forward one hour. So, March 14 will only be 23 hours…

Seth Jarvis

Cosmic Quiz: How fast are we going?

This week’s Cosmic Quiz winner is Greg McMurray, who asked: How fast is the Earth moving relative to everything else? Let’s break it down. The first motion of Earth that we’re all familiar with is rotation – the movement of…