Explanation: There she blows! A dramatic demonstration of how short-lived some comet jets can be was documented in late July by the robotic Rosetta spacecraft orbiting the nucleus of Comet 67P/Churyumov-Gerasimenko. The featured animation depicts changes in the rotating comet with three illuminating stills. Although the first frame shows nothing unusual, the second frame shows a sudden strong jet shooting off the 67P's surface only 20 minutes later, while the third frame -- taken 20 minutes after that -- shows but a slight remnant of the once-active jet. As comets near the Sun, they can produce long and beautiful tails that stream across the inner Solar System. How comet jets produce these tails is a topic of research -- helped by images like this. Another recent Rosetta measurement indicates that the water on Earth could not have come from comets like 67P because of significant differences in impurities. Comet 67P spans about four kilometers, orbits the Sun between Earth and Jupiter, and has been the home for ESA's Rosetta spaceship since 2014 August. Rosetta is currently scheduled to make a slow crash onto Comet 67P's surface in late 2016.
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Based on Astronomy Picture
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Publications with keywords: comet - jet
Publications with words: comet - jet
See also:
- APOD: 2024 April 17 Á Total Eclipse and Comets
- APOD: 2024 April 8 Á The Changing Ion Tail of Comet Pons Brooks
- Comet Pons-Brooks at Night
- APOD: 2024 March 18 Á Comet Pons Brooks Swirling Coma
- Comet 12P/Pons Brooks in Northern Spring
- Structure in the Tail of Comet 12P/Pons Brooks
- The Snows of Churyumov Gerasimenko