Coquina Daily

Tuesday, April 21, 2009

Breathe In, Breathe Out

Tides.

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Martian sand dunes

Although liquids freeze and evaporate quickly into the thin atmosphere of Mars, persistent winds may make large sand dunes appear to flow and even drip like a liquid. Visible on the above image right are two flat top mesas in southern Mars, where the season is changing from Spring to Summer. A light dome topped hill is also visible on the far left of the image. As winds blow from right to left, flowing sand on and around the hills leaves picturesque streaks. The dark arc-shaped droplets of fine sand are called barchans, and are the interplanetary cousins of similar Earth-based sand forms. Barchans can move intact downwind and can even appear to pass through each other. Over the past few weeks, winds on southern Mars have been kicking up dust and are being watched to see if they escalate into another of Mars' famous planet-scale sand storms. APOD

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Today's Activities at Coquina Crossing

7:45 & 8:45 Aqua Aerobics
9:00 Tennis
9:30 Men's Bible Study
10:00 Beginning Tap/Open Art Class
11:00 Speaker: Diamond Group
1:00 Quilters/Rummy/Mah-jongg
2:00 Band Practice
4:00 Ballet/Jazz/Tap Dance
6:30 Ceramics
7:00 Billiards/Needlework/Square Dance

Tomorrow's Activities at Coquina Crossing

7:45 & 8:45 Aqua Aerobics
9:00 Pickle Ball/Ladies Golf
10:00 Chords Practice
10:00 Speaker: Brightway Insurance
1:00 Bridge
2:00 Combo Band Practice
2:30 Bookmobile
4.00 Pickle Ball
7:00 Mah-jongg/Euchre/Darts

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Click once a day to help feed rescue animals.

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Coquina Daily Sunset

 by Nestor M