* Alpha Centauri A: This is a sun-like star with a similar composition to our own Sun. It's primarily made up of:
* Hydrogen (H): About 75% by mass
* Helium (He): About 25% by mass
* Trace amounts of heavier elements: These include oxygen, carbon, iron, and others.
* Alpha Centauri B: This is a slightly smaller and cooler star than our Sun. It's also primarily made up of:
* Hydrogen (H): About 75% by mass
* Helium (He): About 25% by mass
* Trace amounts of heavier elements: These include oxygen, carbon, iron, and others.
* Proxima Centauri: This is a red dwarf star that orbits the A and B stars. It's also primarily made up of:
* Hydrogen (H): About 75% by mass
* Helium (He): About 25% by mass
* Trace amounts of heavier elements: These include oxygen, carbon, iron, and others.
While we can determine the elemental composition of the stars in Alpha Centauri, we don't have any information about the presence of gases in any potential atmospheres around these stars.
