The Subaru Telescope (すばる望遠鏡, Subaru Bōenkyō) is an 8.2-meter (320 in) telescope located at the Mauna Kea Observatory in Hawaii. It is operated by of the National Astronomical Observatory of Japan.
This feed is a live video that shows great views 24 hours per day (weather permitting). At night you can see stars and constellations clearly.