Zodiacal light is a faint glow due to sunlight reflected by dust ejected from comets that floats between the planets.

Or so we thought. A new study shows it might be from… *Mars*.

Even weirder, the observations were made by a probe to Jupiter!https://t.co/USNLjCtieI

— Phil (Newsletter link in bio) Plait (@BadAstronomer) March 26, 2021