Alpha Centauri is a triple star system that consist of two stars like our sun - Centauri A and B - with a red dwarf star known as Proxima Centauri in a very distant orbit around them.
Alpha Centauri B and Proxima have already had rocky planets around the size of Earth discovered around them - now a gas giant planet, like Jupiter, has been discovered around Alpha Centauri A:
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Alpha Centauri B and Proxima have already had rocky planets around the size of Earth discovered around them - now a gas giant planet, like Jupiter, has been discovered around Alpha Centauri A:
New signs found of giant gas planet in 'Earth's neighbourhood'
The possible planet is just four-and-a-half light years away and may have moons that sustain life.
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