The Universe is old, and changing. The best good guess of the Universe's age is 13.798±0.037 billion years old, based on the cosmic microwave background radiation. Independent estimates (based on measurements such as radioactive dating) agree, although they are less precise, ranging from 11 to 20 billion years.
ð ə WORD_BOUNDARY j uː n ɪ v ɜː s WORD_BOUNDARY ɪ z WORD_BOUNDARY oʊ l d WORD_BOUNDARY æ n d WORD_BOUNDARY t̠ʃ eɪ n d̠ʒ ɪ ŋ WORD_BOUNDARY ð ə WORD_BOUNDARY b ɛ s t WORD_BOUNDARY ɡ ʊ d WORD_BOUNDARY ɡ ɛ s WORD_BOUNDARY ʌ v ð ə WORD_BOUNDARY j uː n ɪ v ɜː s ɪ z WORD_BOUNDARY eɪ d̠ʒ WORD_BOUNDARY ɪ z WORD_BOUNDARY θ ɜː t iː n WORD_BOUNDARY s ɛ v ə n h ʌ n d ɹ ɪ d WORD_BOUNDARY n aɪ n t i WORD_BOUNDARY eɪ t WORD_BOUNDARY p l ʌ s WORD_BOUNDARY ɔ ɹ WORD_BOUNDARY m aɪ n ə s WORD_BOUNDARY z iə ɹ oʊ WORD_BOUNDARY z iə ɹ oʊ WORD_BOUNDARY θ ɜː t i WORD_BOUNDARY s ɛ v ə n WORD_BOUNDARY b ɪ l iə n WORD_BOUNDARY j ɪ ɹ z WORD_BOUNDARY oʊ l d WORD_BOUNDARY b eɪ s t WORD_BOUNDARY ɔ n ð ə WORD_BOUNDARY k ɑ z m ɪ k WORD_BOUNDARY m aɪ k ɹ oʊ w eɪ v WORD_BOUNDARY b æ k ɡ ɹ aʊ n d WORD_BOUNDARY ɹ eɪ d ɪ eɪ ʃ ə n WORD_BOUNDARY ɪ n d ɪ p ɛ n d ə n t WORD_BOUNDARY ɛ s t ɪ m ə t s WORD_BOUNDARY b eɪ s t WORD_BOUNDARY ɔ n WORD_BOUNDARY m ɛ ʒ ə ɹ m ə n t s WORD_BOUNDARY s ʌ t̠ʃ WORD_BOUNDARY ʌ z WORD_BOUNDARY ɹ eɪ d ɪ oʊ æ k t ɪ v WORD_BOUNDARY d eɪ t ɪ ŋ WORD_BOUNDARY ʌ ɡ ɹ iː WORD_BOUNDARY ɔ l ð oʊ WORD_BOUNDARY ð eɪ WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY l ɛ s WORD_BOUNDARY p ɹ ɪ s aɪ s WORD_BOUNDARY ɹ eɪ n d̠ʒ ɪ ŋ WORD_BOUNDARY f ɹ ʌ m WORD_BOUNDARY ɪ l ɛ v ə n WORD_BOUNDARY t ə WORD_BOUNDARY t w ɛ n t i WORD_BOUNDARY b ɪ l iə n WORD_BOUNDARY j ɪ ɹ z WORD_BOUNDARY