Using Stellarium to Find Comet NEOWISE

It’s an amazing time to look up to the night sky! For the first time in nearly 6700 years, comet C/2020 F3 NEOWISE has made it’s return to the inner solar system. These small, icy, dirty clumps remain dim and dark through over 90% of their journey from the distant reaches of the Solar System, but once they close in on the immense heat of our nearest star, things change. Comet C/2020 F3 NEOWISE captured by the Parker Solar Probe as it swings around the Sun. Credits: NASA/Johns Hopkins APL/Naval Research Lab/Parker Solar Probe/Brendan Gallagher The ice melts, pockets of...

A Cracked Egg Moon

One of the first things you hear when learning about the states of matter is about good old H2O: Steam, Water, Ice.  Naturally you are asked “Why does Ice float?” The answer is a simple matter of density, frozen water is less dense because water expands when it freezes.  You can do a bit of an experiment by filling a balloon with water.  Paint the balloon and put it in the freezer.  When it freezes the water will expand, and so will the rubbery balloon, but the dried paint will crack at weak points. This is exactly the same thing...