EarthSky News - Oct 22 - Earth's Asteroid Buddy

October 22 Earth's Asteroid Buddy by:

Astronomers confirm Earth has an asteroid buddy It's the best and most stable example to date of a near-Earth companion, or quasi-satellite. Tonight … Spot moon, Antares, Saturn after sunset Most people, worldwide, can spot Sunday evening's young moon after sundown, with Antares and Saturn nearby. Young moon, refracted by atmosphere Wonderful timelapse from Mike Cohea showing the October 20 young moon - only 1.3% illuminated - setting over Newport, Rhode Island, being refracted by Earth's atmosphere.  What is an astronomical unit?  Astronomers use astronomical units - or AU - to describe solar system distances. Definition of AU here. Also, mean distances in AU to prominent solar system objects.

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Spot moon, Antares, Saturn after sunset Miss 'em tonight? No worries. They'll be close the next few evenings.

Young moon, refracted by atmosphere Young moon refracted by the atmosphere as it nears the horizon - Friday evening - by Mike Cohea. See the video here. Submit your photo to EarthSky here!

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EarthSky News - Oct 20 - Orionid Meteors, Top Stories

October 21 Orionid Meteors Top Stories by:

Tonight … Keep watching for Orionid meteors Meteor showers last for several weeks, as Earth passes through a stream of debris left behind by a comet. The Orionids might have peaked Saturday morning, but Sunday morning should be good, too. The UK had a red sun Monday Weather forecasters said it was caused by dust from the Sahara, raised via Hurricane Ophelia. More evidence for a Planet 9 By the way, if Planet 9 does exist … it's definitely not headed our way. Whales and dolphins live 'human-like' lives They work together, talk to each other and use tools. What are gravitational waves? If you understand how a trampoline works, you can understand gravitational waves. Creatures raft across Pacific, thanks to tsunami Hundreds of species hitched rides on debris from the 2011 Japanese tsunami. Traveling to Mars? Top 6 health challenges People making the long space journey will experience health risks they've never faced.

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Keep watching for Orionid meteors Aurora, with Orionid meteor falling above it, by Tommy Eliassen Photography in Norway.

See it! Elusive Uranus at opposition Uranus - most distant planet visible, barely, to the unaided eye - was opposite the sun this week. Here's Uranus on October 20 by Greg Redfern in Virginia. He wrote, "Uranus was visible to my unaided eye but much more colorful in the picture. It took 157 minutes for the light from Uranus to reach my eyes and camera." More photos here. Submit your photo to EarthSky here!

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