Astronomers think that Gliese 581's habitable zone goes from approximately 0.05 AU (astronomical units) to 0.24 AU away from the star. This means that planets orbiting between these distances could be the right temperature to let organic life (life as we know it on Earth) survive.
ʌ s t ɹ ɑ n ə m ə ɹ z WORD_BOUNDARY θ ɪ ŋ k WORD_BOUNDARY ð æ t WORD_BOUNDARY ɡ l iː z ə WORD_BOUNDARY f aɪ v h ʌ n d ɹ ɪ d WORD_BOUNDARY eɪ t i WORD_BOUNDARY w ʌ n WORD_BOUNDARY h æ b ɪ t ə b ə l WORD_BOUNDARY z oʊ n WORD_BOUNDARY ɡ oʊ z WORD_BOUNDARY f ɹ ʌ m WORD_BOUNDARY ʌ p ɹ ɑ k s ɪ m ə t l i WORD_BOUNDARY z iə ɹ oʊ WORD_BOUNDARY z iə ɹ oʊ WORD_BOUNDARY f aɪ v WORD_BOUNDARY oʊ WORD_BOUNDARY ʌ s t ɹ ə n ɑ m ɪ k ə l WORD_BOUNDARY j uː n ɪ t s WORD_BOUNDARY t ə WORD_BOUNDARY z iə ɹ oʊ WORD_BOUNDARY t w ɛ n t i WORD_BOUNDARY f ɔ ɹ WORD_BOUNDARY oʊ WORD_BOUNDARY ʌ w eɪ WORD_BOUNDARY f ɹ ʌ m ð ə WORD_BOUNDARY s t ɑ ɹ WORD_BOUNDARY ð ɪ s WORD_BOUNDARY m iː n z WORD_BOUNDARY ð æ t WORD_BOUNDARY p l æ n ɪ t s WORD_BOUNDARY ɔ ɹ b ɪ t ɪ ŋ WORD_BOUNDARY b ɪ t w iː n WORD_BOUNDARY ð iː z WORD_BOUNDARY d ɪ s t ə n s ɪ z WORD_BOUNDARY k ʊ d WORD_BOUNDARY b iː WORD_BOUNDARY ð ə WORD_BOUNDARY ɹ aɪ t WORD_BOUNDARY t ɛ m p ɹ ɪ t̠ʃ ə ɹ WORD_BOUNDARY t ə WORD_BOUNDARY l ɛ t WORD_BOUNDARY ɔ ɹ ɡ æ n ɪ k WORD_BOUNDARY l aɪ f WORD_BOUNDARY l aɪ f WORD_BOUNDARY æ z WORD_BOUNDARY w iː WORD_BOUNDARY n oʊ WORD_BOUNDARY ɪ t WORD_BOUNDARY ɔ n WORD_BOUNDARY ɜː θ WORD_BOUNDARY s ə ɹ v aɪ v WORD_BOUNDARY