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It’s Been 32 Years Since We Last Explored Uranus

The blue-green crescent of Uranus imaged by a departing Voyager 2 on January 25, 1986 (NASA)

The blue-green crescent of Uranus imaged by a departing Voyager 2 on January 25, 1986 (NASA)

Voyager 2 may have been the second of NASA’s famous twin exploration spacecraft but it actually launched first, on August 20, 1977. Eight and a half years later it became the first (and, to date, last) spacecraft to visit Uranus, at 31,500 miles across the third largest planet in the Solar System. Voyager 2 made its closest pass by Uranus 32 years ago, giving us our best views ever of the enormous ice giant planet and its moons.

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It’s Been 31 Years Since We Last Visited Uranus

The blue-green crescent of Uranus imaged by a departing Voyager 2 on January 25, 1986 (NASA)

The blue-green crescent of Uranus imaged by a departing Voyager 2 on January 25, 1986 (NASA)

Voyager 2 may have been the second of NASA’s famous twin exploration spacecraft but it launched first, on August 20, 1977. Eight and a half years later it became the first (and last) spacecraft to visit Uranus, at 31,500 miles across the third largest planet in the Solar System. Voyager 2 made its closest pass by Uranus 31 years ago, giving us our best views to this day of the enormous ice giant and its moons.

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Surprising Structures Discovered at the Bottom of Uranus

Voyager 2 view of Uranus with  rings and moons noted (Credit: NASA/University of Arizona/Erich Karkoschka)

Enhanced Voyager 2 view of Uranus with rings and moons noted (Credit: NASA/University of Arizona/Erich Karkoschka)

Out in the depths of our solar system, about 1.8 billion miles away from the Sun somewhere between the planets Saturn and far-flung Neptune, orbits the oddball ice giant Uranus – a frigid, thinly-ringed world tipped almost completely on its side and shrouded in both mystery and pale blue-green clouds. Aside from the occasional bright storm clouds spotted along the planet’s mid-latitudes and the even rarer darker blue storms, Uranus’ atmosphere has proven to be remarkably featureless… especially around its high southern latitudes.

Now, astronomer Erich Karkoschka from the University of Arizona has used imagery from Voyager 2’s 1986 visit to Uranus to bring out some visible features in the planet’s skies by using pattern recognition software to map out even the most subtle differences, and then boosting the contrast to make them more apparent. What he’s found are atmospheric anomalies that hint at curious structures in the planet’s dense core far beneath.

Watch a very cool animation below showing the new details Karkoschka has teased out of 29-year-old Voyager 2 data:

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Voyager’s Visit to Uranus

The blue-green crescent of a sunlit Uranus, seen by a departing Voyager on January 25, 1986 (NASA)

Voyager 2 may have been the second of NASA’s twin exploration spacecraft but it launched first, 35 years ago today on August 20, 1977. 8 1/2 years later it became the first (and last!) spacecraft to visit the gas giant Uranus, the third largest planet in the Solar System.

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A New Look at Neptune

Ok, ok… it’s not “new” (it’s from a HubbleNews article released in 2005) but since I just came across it myself, it’s new to me! So maybe it’s new to you too. 🙂

The video above was created from images taken by the Hubble Space Telescope, showing distant Neptune (we’re talking four and a half billion km away here!) rotating on its axis, four of its 13 known moons visible in orbit. The images were taken every 4-5 hours between the days of April 25th – 30th, 2005, and were then combined to make a dynamic movie animation. And what a cool animation it is! Read the rest of this entry

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