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Exploding stars, dark matter and meteor's

Exploding stars, dark matter and meteor's

Thursday 25th July 2019 3:40 pm

Can cats land on their feet in space? Why are planets round? What would happen to the earth if the sun moved closer?

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@beakerstreetsci
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Water will change its density a little bit with temperature, but ethanol does it 3.7 times better – and the modern liquids in a Galileo Thermometer are better again. This liquid is inside a sealed container – to avoid the effects of the changing air pressure.
Inside the container are a bunch of hollow, weighted glass balls – each carefully calibrated to have a different density, and each with a brass tag indicating the temperature. The single ball that is floating freely indicates the temperature of the liquid.
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