The planet smelled of gunpowder in the solar system

Odor on each planet is determined by the major chemical components in the atmosphere.

The astronauts once collected soil samples on the Moon describing this object smelling like gunpowder after burning, according to Howstuffworks. This is consistent with the key component of the Moon, silicon dioxide, calcium and magnesium.

Mercury is almost odorless.

Mercury, the planet closest to the Sun, has lost most of its atmosphere long ago because of the sun-blown wind, the most abundant is sodium, so the planet is almost odorless. Venus, with its atmosphere much more massive than Earth and full of sulfuric acid clouds, has a pungent odor of rotten eggs.

Mars with a synthesis of iron, magnesium, sulfur, and acid in an environment rich in carbon dioxide also produces the smell of rotten eggs. The smell of the giant planet Jupiter changes according to the atmosphere. The outer atmosphere smells like glass cleaner because it contains a lot of ammonia, while the lower atmosphere has an almond odor because it contains a lot of hydrogen cyanide.

Although the smell of Saturn has not been determined, the planet's Titan moon with a nitrogen-containing atmosphere may smell like a petroleum refinery.

Uranus has almost no odor when containing hydrogen, helium and about 2% of methane. Neptune has a smell similar to Uranus.