sun

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The Solar Cycle

The Sun is an active girl – or guy if you like. There’s a cycle of activity every eleven years. At the peak, sunspots are plenty, at a low, there’s hardly a sunspot in sight….


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Looking at grampa and grammy

Wanna know how your ancestors looked like? The Spitzer telescope might show you how. New observations from NASA’s Spitzer Space Telescope strongly suggest that infrared light detected in a prior study originated from clumps of…


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A rough start to the Solar System

The Solar System might have had a rougher start than previously thought. From ScienceNOW: According to the prevailing hypothesis, the solar system condensed out of an immense disk of gas and dust about 4.6 billion…


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GraphDark

With GraphDark, a very simple program, you can draw graphs showing you when Sun, Moon and planets rise and set. These graphs are well known from astronomy magazines like Sky & Telescope.