Contrary to the classical image of an old astronomer peering through a telescope through the dark hours of the night, it is far more common to use a charge-coupled device (CCD) camera to record a long, deep exposure, allowing a more sensitive image to be created because the light is added over time.
kˈɑːntɹɛɹi tə ðə klˈæsɪkəl ˈɪmɪdʒ əvən ˈoʊld ɐstɹˈɑːnəmɚ pˈɪɹɪŋ θɹuː ɐ tˈɛlᵻskˌoʊp θɹuː ðə dˈɑːɹk ˈaʊɚz ʌvðə nˈaɪt, ɪɾ ɪz fˈɑːɹmˌoːɹ kˈɑːmən tə jˈuːz ɐ tʃˈɑːɹdʒkˈʌpəld dɪvˈaɪs sˌiːsˌiːdˈiː kˈæmɹə tə ɹᵻkˈoːɹd ɐ lˈɔŋ, dˈiːp ɛkspˈoʊʒɚ, ɐlˈaʊɪŋ ɐ mˈoːɹ sˈɛnsᵻtˌɪv ˈɪmɪdʒ təbi kɹiːˈeɪɾᵻd bɪkˈʌz ðə lˈaɪt ɪz ˈædᵻd ˌoʊvɚ tˈaɪm.