Wednesday 23 August 2017

'Dragonfly’ dual-quadcopter aims to explore Titan, Saturn’s largest moon

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The Dragonfly mission concept would use an instrumented, radioisotope-powered, dual-quadcopter to explore Saturn's largest moon, Titan, one of our solar system’s “ocean worlds.”
via Science Daily
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Best ever image of a star's surface, atmosphere

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Using ESO's Very Large Telescope Interferometer astronomers have constructed the most detailed image ever of a star -- the red supergiant star Antares. They have also made the first map of the velocities of material in the atmosphere of a star other than the sun, revealing unexpected turbulence in Antares's huge extended atmosphere.
via Science Daily
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The Crown of the Sun

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During a total solar eclipse, the Sun's extensive outer atmosphere, or corona, is an inspirational sight. Streamers and shimmering features visible to the eye span a brightness range of over 10,000 to 1, making them notoriously difficult to capture in a single photograph. But this composite of telescopic images covers a wide range of exposure times to reveal the crown of the Sun in all its glory. The aligned and stacked digital frames were taken in clear skies above Stanley, Idaho in the Sawtooth Mountains during the Sun's total eclipse on August 21. A pinkish solar prominence extends just beyond the right edge of the solar disk. Even small details on the dark night side of the New Moon can be made out, illuminated by sunlight reflected from a Full Earth.

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