Frequency! It’s an important thing to measure, which is why [Jacques Pelletier] built a frequency counter some time ago. The four-function unit is humble, capable, and also an entry into our ...

The JWST has turned its powerful eye on the Apep Nebula, sometimes known as the Cosmic Serpent, and found it eating its tail.

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Solar System Planets. Astronomy articles on the eight planets, plus the two dwarf planets, Pluto and Eris. Great pictures of everything in the solar system. Updated daily.