The Sky at Night — Episode 3: Mauna Kea - Half-way to Space

You are watching the episode Mauna Kea - Half-way to Space Mauna Kea, in the Hawaiian Islands, is almost 14,000 feet high. At its summit the air is thin and the skies are clear-which is why some of the world's largest telescopes have been set up there. Patrick Moore pays it a visit.