Люди во время встречи первого восхода солнца Нового 2023 года в Сеуле  - Sputnik International, 1920, 21.04.2023
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Red Planet, Green Glow: Light Emission Phenomenon Spotted in Martian Sky

© Photo : Twitter / @esaThe European Space Agency’s ExoMars Trace Gas Orbiter (TGO) detects glowing green oxygen aura in Martian atmosphere.
The European Space Agency’s ExoMars Trace Gas Orbiter (TGO) detects glowing green oxygen aura in Martian atmosphere. - Sputnik International, 1920, 19.11.2023
A peculiar atmospheric effect that can be observed on Earth has been spotted on Mars, according to a new study published earlier this month.
The Trace Gas Orbiter spacecraft that has been orbiting Mars for several years has detected a green nightglow in the Red Planet's atmosphere via the onboard Nadir and Occultation for Mars Discovery (NOMAD) spectrometer.
Nightglow, also known as airglow, is essentially an emission of light by a planet’s atmosphere.
In Mars’ case, this emission occurs “due to the recombination of oxygen atoms created in the summer atmosphere and transported by winds to high winter latitudes, at altitudes of 40 to 60 km,” according to Lauriane Soret, one of the authors of the study on the subject that has been published in the journal Nature Astronomy last week.
“This O2 nightglow should be observable from a Martian orbiter as well as from the Martian surface with the naked eye under clear sky conditions,” the researchers wrote, adding that “these observations pave the way to future global observations of the Martian atmospheric circulation with simpler lower-cost instrumentation.”
This mosaic of Mars is a compilation of images captured by the Viking Orbiter 1. The center of the scene shows the entire Valles Marineris canyon system, more than 2,000 miles (3,000 kilometers) long, 370 miles (600 kilometers) wide and 5 miles (8 kilometers) deep, extending from Noctis Labyrinthus, the arcuate system of graben to the west, to the chaotic terrain to the east. - Sputnik International, 1920, 18.10.2023
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According to a statement shared on the European Space Agency’s website, the nightglow “serves as a tracer of atmospheric processes” and “can provide a wealth of information about the composition and dynamics of a region of the atmosphere difficult to measure, as well as the oxygen density." It can also help determine “how energy is deposited by both the Sun’s light and the solar wind.”
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