Argon
- A chemical element with the symbol Ar and atomic number 18. It is a colorless, odorless, inert noble gas that is the third most abundant gas in the Earth's atmosphere, commonly used in lighting and industrial processes due to its non-reactive nature. nounArgon is often used in incandescent and fluorescent lighting to prevent the filament from oxidizing.Scientists fill the inert gas chamber with argon to create a controlled environment for sensitive experiments.
- A term used in the context of space and astronomy to refer to the noble gas present in the atmospheres of planets and stars, or in interstellar space, often studied in astrophysics. nounSpectroscopic analysis revealed the presence of argon in the atmosphere of Mars.The detection of argon in distant stars helps astronomers understand the composition of celestial bodies.