EarthSky News - Nov 22 - Flowing Sand, Not Water, on Mars

November 22 Flowing Sand, Not Water, on Mars by:

Flowing sand, not water, on Mars The dark streaks on Mars known as recurring slope lineae are likely the result of repeated avalanches of sand and dust, rather than seeping water, new research shows. Show family and friends 2 planets U.S. Thanksgiving is Thursday, and many are celebrating with family and friends. On that evening walk after an awesome meal, point out Mercury and Saturn. A farewell to Saturn Two days before it plunged into Saturn's atmosphere last September 15, the Cassini spacecraft returned this final, full mosaic image of the planet. Tonight … Use Big Dipper to find star Capella You've heard of the Big Dipper's pointer stars, which point to Polaris? You can also use them to find the star Capella, aka the Goat Star. No EarthSky News tomorrow. We'll be giving thanks for all of you. If you're celebrating Thanksgving ... hope it's a great one!

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A farewell to Saturn This view is constructed from 42 wide-angle shots acquired across 2 hours by Cassini, taken using red, green and blue spectral filters, combined to create a natural-color view.

Last night's moon, Saturn, Mercury The young moon has swept past the planets Saturn and Mercury this week and still hovers not far from them, with its lighted face pointed toward them. This photo is from Tuesday evening, from Annie Lewis in Madrid, Spain. Watch for them tonight and Thursday evening, too. Submit your photo to EarthSky here!

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EarthSky News - Nov 21 - Ta Da! 1st Interstellar Asteroid

November 21 Ta Da! 1st Interstellar Asteroid by:

It's the 1st known interstellar asteroid It swept nearest the sun in September, then sped away again, back to interstellar space. Astronomers named it `Oumuamua. It's dark red, very elongated and unlike anything in our solar system. What monarch butterflies prefer Will our survival strategy for monarchs work? Initiatives emphasize milkweed plantings along roadsides. New research shows egg-laying monarchs much prefer off-road farmlands. Tonight … Come to know the Pleiades, or 7 Sisters At this time of year, for all of us around the globe, the Pleiades star cluster culminates - reaches its highest point in the sky - around midnight. Fern, contrail shadow, singing dunes It was a beautiful day for natural phenomena in the sky, and on the ground! There will be no EarthSky News on U.S. Thanksgiving Day (Thursday, November 23).

Keep up with all phases of the moon every night of the year! We sold out of these calendars quickly last year. Get yours now! P.S. They make great holiday gifts.

Come to know the Pleiades, or 7 Sisters This image is from Krishnan Subramanian near Mumbai, India. It's from a star party earlier this month and shows a laser pointing toward the Pleiades. Krishnan wrote: "The Pleiades star cluster is called Krithika in India. The red streak on the left is that of an aircraft."

Fern, contrail shadow, singing dunes Fern Zalin Jones wrote: "That is me, triumphant!" She's atop a dune at Kelso Dunes in California's Mojave Desert. See the contrail shadow in the background? Photo taken November 11, 2017 by Greg Lewis. Submit your photo to EarthSky here!

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