Most big telescopes for astronomy are made to study very carefully things that are already known. A few are made for searching, such as for unknown asteroids or extrasolar planets. Most big telescopes are made to be used with a CCD (Charge-Coupled Devices) camera instead of just the eye. This is called "Astrophotography". A Go-to telescope is needed to track Deep Sky objects and is placed on an Equatorial Mount for the axis to point towards Polaris, this is called polar alignment.
m oʊ s t WORD_BOUNDARY b ɪ ɡ WORD_BOUNDARY t ɛ l ɪ s k oʊ p s WORD_BOUNDARY f ɔ ɹ WORD_BOUNDARY ʌ s t ɹ ɑ n ə m i WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY m eɪ d WORD_BOUNDARY t ə WORD_BOUNDARY s t ʌ d i WORD_BOUNDARY v ɛ ɹ i WORD_BOUNDARY k ɛ ɹ f ə l i WORD_BOUNDARY θ ɪ ŋ z WORD_BOUNDARY ð æ t WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY ɔ l ɹ ɛ d i WORD_BOUNDARY n oʊ n WORD_BOUNDARY ʌ WORD_BOUNDARY f j uː WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY m eɪ d WORD_BOUNDARY f ɔ ɹ WORD_BOUNDARY s ɜː t̠ʃ ɪ ŋ WORD_BOUNDARY s ʌ t̠ʃ WORD_BOUNDARY ʌ z WORD_BOUNDARY f ɔ ɹ WORD_BOUNDARY ʌ n n oʊ n WORD_BOUNDARY æ s t ə ɹ ɹ ɔɪ d z WORD_BOUNDARY ɔ ɹ WORD_BOUNDARY ɛ k s t ɹ ə s oʊ l ə ɹ WORD_BOUNDARY p l æ n ɪ t s WORD_BOUNDARY m oʊ s t WORD_BOUNDARY b ɪ ɡ WORD_BOUNDARY t ɛ l ɪ s k oʊ p s WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY m eɪ d WORD_BOUNDARY t ə b i WORD_BOUNDARY j uː z d WORD_BOUNDARY w ɪ ð WORD_BOUNDARY ʌ WORD_BOUNDARY s iː s iː d iː WORD_BOUNDARY t̠ʃ ɑ ɹ d̠ʒ k ʌ p ə l d WORD_BOUNDARY d ɪ v aɪ s ɪ z WORD_BOUNDARY k æ m ɹ ə WORD_BOUNDARY ɪ n s t ɛ d WORD_BOUNDARY ʌ v WORD_BOUNDARY d̠ʒ ʌ s t WORD_BOUNDARY ð ɪ WORD_BOUNDARY aɪ WORD_BOUNDARY ð ɪ s WORD_BOUNDARY ɪ z WORD_BOUNDARY k ɔ l d WORD_BOUNDARY æ s t ɹ ə f oʊ t ɑ ɡ ɹ ə f i WORD_BOUNDARY ʌ WORD_BOUNDARY ɡ oʊ t ə WORD_BOUNDARY t ɛ l ɪ s k oʊ p WORD_BOUNDARY ɪ z WORD_BOUNDARY n iː d ɪ d WORD_BOUNDARY t ə WORD_BOUNDARY t ɹ æ k WORD_BOUNDARY d iː p WORD_BOUNDARY s k aɪ WORD_BOUNDARY ɑ b d̠ʒ ɛ k t s WORD_BOUNDARY æ n d WORD_BOUNDARY ɪ z WORD_BOUNDARY p l eɪ s t WORD_BOUNDARY ɔ n WORD_BOUNDARY ʌ n WORD_BOUNDARY ɪ k w ʌ t ɔ ɹ ɪ ə l WORD_BOUNDARY m aʊ n t WORD_BOUNDARY f ə ɹ ð ɪ WORD_BOUNDARY æ k s ɪ s WORD_BOUNDARY t ə WORD_BOUNDARY p ɔɪ n t WORD_BOUNDARY t ə w ɔ ɹ d z WORD_BOUNDARY p oʊ l ɑ ɹ ɹ ɪ s WORD_BOUNDARY ð ɪ s WORD_BOUNDARY ɪ z WORD_BOUNDARY k ɔ l d WORD_BOUNDARY p oʊ l ə ɹ ɹ WORD_BOUNDARY ʌ l aɪ n m ə n t WORD_BOUNDARY