Astronomical distances are often measured in the time it would take a beam of light to travel between two points ("see light-year"). Light in a vacuum travels approximately 300,000 kilometers per second or 186,000 miles per second.
ʌ s t ɹ ə n ɑ m ɪ k ə l WORD_BOUNDARY d ɪ s t ə n s ɪ z WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY ɔ f ə n WORD_BOUNDARY m ɛ ʒ ə ɹ d WORD_BOUNDARY ɪ n ð ə WORD_BOUNDARY t aɪ m WORD_BOUNDARY ɪ t WORD_BOUNDARY w ʊ d WORD_BOUNDARY t eɪ k WORD_BOUNDARY ʌ WORD_BOUNDARY b iː m WORD_BOUNDARY ʌ v WORD_BOUNDARY l aɪ t WORD_BOUNDARY t ə WORD_BOUNDARY t ɹ æ v ə l WORD_BOUNDARY b ɪ t w iː n WORD_BOUNDARY t uː WORD_BOUNDARY p ɔɪ n t s WORD_BOUNDARY s iː WORD_BOUNDARY l aɪ t j ɪ ɹ WORD_BOUNDARY l aɪ t WORD_BOUNDARY ɪ n WORD_BOUNDARY ʌ WORD_BOUNDARY v æ k j uː m WORD_BOUNDARY t ɹ æ v ə l z WORD_BOUNDARY ʌ p ɹ ɑ k s ɪ m ə t l i WORD_BOUNDARY θ ɹ iː h ʌ n d ɹ ɪ d WORD_BOUNDARY z iə ɹ oʊ z iə ɹ oʊ WORD_BOUNDARY z iə ɹ oʊ WORD_BOUNDARY k ɪ l ɑ m ɪ t ə ɹ z WORD_BOUNDARY p ɜː WORD_BOUNDARY s ɛ k ə n d WORD_BOUNDARY ɔ ɹ WORD_BOUNDARY w ʌ n h ʌ n d ɹ ɪ d WORD_BOUNDARY eɪ t i WORD_BOUNDARY s ɪ k s WORD_BOUNDARY z iə ɹ oʊ z iə ɹ oʊ WORD_BOUNDARY z iə ɹ oʊ WORD_BOUNDARY m aɪ l z WORD_BOUNDARY p ɜː WORD_BOUNDARY s ɛ k ə n d WORD_BOUNDARY