2007-03-15 05:32:43 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
Just like any star. Mostly hydrogen. Some helium. A smattering of heavy elements.
Its metallicity (proportion of elements heavier than hydrogen) is a bit more (130-230%) than the sun's.
edit: you know by looking at spectral lines--each element leaves unique "fingerprints" on the light coming from the star
2007-03-15 05:36:24 · answer #1 · answered by Anonymous · 2⤊ 0⤋
2 or 3 stars, probably a few planets and rubble...
If you want to know what elements are there, just open up a Periodic Table of the Elements. It's in the same universe as earth, after all!
2007-03-15 05:59:31 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Alpha Centauri is a 3 star system. Do you mean Alpha Centauri A, Alpha Centauri B, or Proxima Centauri?
Alpha Centauri A:
Hydrogen 71.5%
Helium 25.8%
Oxygen 0.97%
Carbon 0.54%
Nitrogen 0.13%
Silicon 0.13%
Magnesium 0.10%
Neon 0.08%
Iron 0.19%
Sulfur 0.05%
... and many other elements.
2007-03-15 05:57:35 · answer #3 · answered by morningfoxnorth 6 · 0⤊ 0⤋
It's four light years away... how am I supposed to know?
2007-03-15 05:36:47 · answer #4 · answered by Jazzycat 2 · 0⤊ 2⤋
stardust.......
2007-03-15 05:34:53 · answer #5 · answered by tracymoo 6 · 0⤊ 1⤋