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StarDateYour guide to the universe Author: Billy Henry
StarDate, the longest-running national radio science feature in the U.S., tells listeners what to look for in the night sky. Language: en-us Genres: Astronomy, Education, Science Contact email: Get it Feed URL: Get it iTunes ID: Get it |
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Dragon’s Eyes
Friday, 8 May, 2026
A pair of eyes stares down from the northeast as night falls now – the eyes of Draco, the dragon. They’re to the upper left of brilliant Vega, one of the night sky’s most prominent stars. The brighter eye is the star Eltanin, the dragon’s leading light. The name means “the serpent,” because the star once represented the entire dragon. Eltanin is an orange giant. It’s a good bit bigger, heavier, and brighter than the Sun. That makes it easy to see even though it’s more than 150 light-years away. The star should get a lot easier to see in the coming millennia. That’s because Eltanin and the Sun are moving closer together. In about one and a half million years, they’ll be at their closest – just 28 light-years apart. Assuming Eltanin hasn’t changed much by then, it’ll be the brightest star in the night sky – about as bright as the current champ, Sirius. The other eye, Rastaban, is just above Eltanin. Its name means “head of the serpent.” It’s more than twice as far as Eltanin. It, too, is a giant, but it’s much bigger and brighter – a thousand times as bright as the Sun. So it looks only a little fainter than Eltanin despite the extra distance. The rest of Draco curves to the left and above the dragon’s eyes, and curls around Polaris, the North Star. The eyes stare in the opposite direction – toward Hercules, who killed the dragon before both of them were placed in the heavens. Script by Damond Benningfield
