Tuesday, April 5, 2016: Zodiacal light rising from the horizon, red airglow along the horizon, and the Milky Way all appear in this photo taken in the Chilean desert. Zodiacal light results from cosmic dust floating in the ecliptic, the plane of Earth’s orbit, scattering sunlight. Airglow arises from upper atmosphere processess, including cosmic rays, recombining photoionized atoms, and chemical reactions between oxygen, nitrogen, hydroxyl, sodium, and lithium atoms. Billlions of stars glow in the Milky Way, our galaxy, high above. Image released April 4, 2016.
— Tom Chao
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