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epD4k TIL that radio waves aren’t just really high-pitched sound waves, they’re actually big light waves.
ANaNx TIL Now That's Beautiful Like Earth, Saturn gets auroras at its poles. They're invisible to the unaided human eye, but the Cassini spacecraft and the Hubble Space Telescope captured footage of them using infrared and ultraviolet imaging tech.
BgppW TIL the TRAPPIST-1 system hosts 7 identified exoplanets and 3 of them (TRAPPIST-1e, TRAPPIST-f, TRAPPIST-g) are Earth-sized and within the solar system's habitable zone