Saturday, December 16, 2017

EarthSky News - Dec 16 - Top Stories This Week

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Astronomers chart galaxy orbits in Local Supercluster
"We are not only visualizing the detailed structure of our Local Supercluster of galaxies, but we are also seeing how the structure developed over the history of the universe."
Juno probes depths of Jupiter's Great Red Spot
Juno spacecraft data show the Great Red Spot - nearly 1.5 Earths wide - with roots penetrating some 200 miles (300 km) into Jupiter's atmosphere.

Awesome Geminid shower? Thank 3200 Phaethon

This mysterious rock-comet is the parent body of the Geminid meteor shower and the likely reason the Geminids were so strong in 2017. The rock-comet itself is closest to Earth today.
How to see 3200 Phaethon
You can't see 3200 Phaethon with the eye alone. But backyard telescopes can pick it up.

A grand year for the Geminids

With 3200 Phaethon nearby, the 2017 Geminid meteor shower was thought to have a better-than-average chance of producing a rich display. And so it did! Photos here.
Solstice coming up December 21
Solstice 2017 arrives on December 21. Everything you need to know.
Tonight … See a star that changes its brightness
Sheliak is a variable star in the constellation Lyra the Harp.
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An EarthSky lunar calendar is sure to delight. Or give the gift that gives back! Check out the new colors and designs of our EarthSky Cares Tees. A percentage of proceeds collected will be donated to select organizations. 

Tonight … See a star that changes its brightness
You can notice Sheliak's brightness changes in a cycle lasting 6.5 days.
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Gaia's view of the Large Magellanic Cloud
The Large Magellanic Cloud (LMC), one of the nearest galaxies to our Milky Way, as viewed by ESA's Gaia satellite after its first 14 months of operations.
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