- Mars Lost Atmosphere to Space
- Rosetta Sees Changing Face of Comet
- Observing the planets Mars, Jupiter, Saturn this week
NASA’s MAVEN mission has confirmed that the solar wind stripped the Red Planet of its atmosphere. http://www.skyandtelescope.com/astronomy-news/mars-lost-atmosphere-to-space-3003201723/Based on the ratio of various elements’ isotopes planetary scientists suspect that the Red Planet has lost anywhere from 25% to 90% of its atmosphere over the last 4-ish billion years, with the estimates favoring at least 50%. READ THE ARTICLE
Researchers have used data from the Rosetta mission to link outbursts on Comet 67P/Churyumov-Gerasimenko with dramatic surface changes. Changes seen on the comet’s surface provide researchers with the before and after “smoking gun” of seeing the possible triggering mechanism for a cometary outburst in action. READ THE ARTICLE
Jupiter (magnitude –2.5, in Virgo) comes to opposition on April 7th. It rises around sunset, shines low in the east-southeast after nightfall, high in
the southeast by 11 p.m., and highest due south around 1 a.m. daylight saving time. Spica hangs 7° below it. In a telescope Jupiter is 44 arcseconds across its equator.
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Saturn (magnitude +0.4, in Sagittarius upper right of the Teapot) rises in the early morning hours and glows in the south by early dawn. Redder Antares (magnitude +1.0) twinkles 19° to Saturn’s right. Saturn doesn’t reach opposition until June 14th.
The blue 10° scale is about the width of your fist at arm’s length.