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Explanation: Captured last week after sunset on a Chilean autumn night, an exceptional airglow floods this allsky view from Las Campanas Observatory. The airglow was so intense it diminished parts of the Milky Way as it arced horizon to horizon above the high Atacama desert. Originating at an altitude similar to aurorae, the luminous airglow is due to chemiluminescence, the production of light through chemical excitation. Commonly recorded in color by sensitive digital cameras, the airglow emission here is fiery in appearance. It is predominately from atmospheric oxygen atoms at extremely low densities and has often been present during southern hemisphere nights over the last few years. Like the Milky Way, on that dark night the strong airglow was very visible to the eye, but seen without color. Jupiter is brightest celestial beacon though, standing opposite the Sun and near the central bulge of the Milky Way rising above the eastern (top) horizon. The Large and Small Magellanic clouds both shine through the airglow to the lower left of the galactic plane, toward the southern horizon.
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NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day
Publications with keywords: Milky Way
Publications with words: Milky Way
See also:
- APOD: 2025 May 20 B Milky Way over Maunakea
- APOD: 2025 May 13 B Gaia Reconstructs a Top View of our Galaxy
- APOD: 2025 May 12 B Gaia Reconstructs a Side View of our Galaxy
- Galaxies in Space
- APOD: 2025 February 9 B Milky Way over the Australian Pinnacles
- APOD: 2024 November 24 B Journey to the Center of the Galaxy
- APOD: 2024 November 5 B Milky Way over Easter Island