a Red Giant red sun http://www.space.com/22471-red-giant-stars.html red giant red giant red giant space.com sun will become a red giant in 5 billion years expand 100 to 1,000 in about 5 billion years red giant 5 and 7 billion years a red supergiant Red giants space.com red sun r space.com 5 and 7 billion years The sun will be a red giant someday. Red giants red giant stars Red giants red giant's stellar winds http://www.space.com/22471-red-giant-stars.html the sun will bloat into a red giant star Red giants Space.com 5 and 7 billion years http://www.space.com/22471-red-giant-stars.html red supergiants red giant red supergiant The Future of the Sun This will not happen for 5 billion years http://www.space.com/22471-red-giant-stars.html red giant red sun We know giant star red giant http://www.space.com/22471-red-giant-stars.html a few thousand to a billion years red giant stars Red giants space.com evolved red giant stars Roter Riese red giants 5 and 7 billion years red giant star red giants Space.com. James Gitlin/STScI AVL 20.000 fois plus lumineuse The Future of the Sun