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Acetylene, found in the atmosphere of gas giants and in the interstellar medium.

Nitrous Oxide, found in small amounts in the Earth's atmosphere.

Ozone, found in the Earth's stratosphere as the ozone layer.

Formic Acid, detected in interstellar medium.

Magnesium Chloride, speculated to be found in interstellar ice and dust.

Benzene, presence suggested in interstellar space.

Calcium Carbonate, found on the surfaces of rocky planets and moons.

Methanol, found in comets and the interstellar medium.

Hydrogen Chloride, observed in the atmospheres of Mars and Venus.

Sulfur Dioxide, found in volcanic gases, including those on Io, one of Jupiter's moons.

Silicon Dioxide, found in dust and planetary bodies, commonly known as quartz on Earth.

White Phosphorus, suggested by astronomers to possibly exist in stellar nurseries.

Water, found in comets, planets, stars, and molecular clouds.

Hydrogen Sulfide, found in gas giant planets and some volcanic moons.

Sodium Chloride, detected in the atmospheres of some exoplanets.

Trihydrogen cation, found in interstellar space and in giant planet atmospheres.

Argon, a component of the Earth's atmosphere and found in the atmospheres of other planets

Ethylene, detected in the atmospheres of gas giants and in interstellar clouds.

Neon, found in the atmospheres of gas giants and stars.

Hydrogen Cyanide, found in the interstellar medium and molecular clouds.

Nitric Oxide, found in planetary atmospheres and interstellar medium.

Helium, second most abundant element in the observable universe, found in stars and gas giant planets.

Ethane, found in atmospheres of planets like Neptune and in interstellar medium.

Carbon Dioxide, found in the atmospheres of planets such as Venus, Mars, and Earth.

Carbon Monoxide, found in the atmospheres of some planets and stars, and in interstellar medium.

Potassium Chloride, found in some mineral deposits on Mars.

Methane, found on planets like Earth, and moons like Titan.

Oxygen, a component of the Earth's atmosphere and produced by photosynthesis.

Molecular Hydrogen, the most abundant molecule in the universe, found in stars and gas giant planets.

Iron(II) Oxide, present in the dust of Mars and on other planetary bodies.

Silicon Monoxide, found in stardust and as a part of silicate minerals in space.

Ammonia, found in the atmospheres of gas giants like Jupiter and in interstellar ice.

Elemental Sulfur, can be found around sulfur-rich volcanic regions on moons and planets.

Titanium Dioxide, found in the atmospheres of cool stars.

Nitrogen, makes up the majority of the Earth's atmosphere and is found on other planets as well.

Buckminsterfullerene, detected in space via its emissions.