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 Observing Jupiter's Moons

Published 2010/11/22 19:16:00 - Watching

Stargazers shouldn't have any trouble finding Jupiter now. Our "evening star" shines at a dazzling bright --2.6 magnitude above the southeastern horizon at dusk, and it's currently brighter than every star in the evening sky.
Jupiter's highest altitude and its best time to be viewed through a telescope in steady air is around 8 p.m., when it stands about 45 degrees above the southern horizon. One clenched fist held out to the horizon equals about 10 degrees.
Good binoculars or a small telescope will also show the planet's four large Galilean moons. They appear as bright "stars" on either side of Jupiter. From innermost to outermost, they are Io, Europa, Ganymede and Callisto. As each of these moons orbits around Jupiter, they will shift positions from night to night. It's impossible to identify the moons without looking at a reference chart, so our illustration today will show their position this weekend at 10 p.m. as seen through binoculars. Sky & Telescope and Astronomy magazines also print a complete chart each month
Key words:Monocular Telescope, Gift & Promotional Binoculars, Straight Binoculars, Monocular Telescope
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