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Comet 67P/Churyumov-Gerasimenko — ESA Cometary comae are a mixture of gas and ice-covered dust. Processing on the surface and in the coma change the composition of ice on dust grains

NASA’s Mars Chopper concept, shown in a design software rendering, is a more capable proposed follow-on to the agency’s Ingenuity Mars Helicopter, which arrived at the Red Planet in the

Mirror Bacteria — Grok via Astrobiology.com Editor’s note: As we study how Earth life is put together it is helpful to understand alternate ways that chemistry could combine to form

The orbits of the fourteen currently known dark comets, Jupiter, and the Earth. One orbital period is shown for each object starting on the vernal equinox in 2023 March, and