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

Sodium Chloride, detected in the atmospheres of some exoplanets.

Formic Acid, detected in interstellar medium.

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

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

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

Benzene, presence suggested in interstellar space.

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

Hydrogen Fluoride, found in interstellar gas clouds.

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

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

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

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

Buckminsterfullerene, detected in space via its emissions.

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

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

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

Methanol, found in comets and the interstellar medium.

Titanium Dioxide, found in the atmospheres of cool stars.

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

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

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.

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

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

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

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

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

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

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

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

Potassium Chloride, found in some mineral deposits on Mars.

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

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