Rings and Seasons of Saturn

APOD: 2021 September 19 - Rings and Seasons of Saturn

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2021 September 19
The picture shows Saturn in yearly images taken from
2004 to 2015 from Earth. 
Please see the explanation for more detailed information.

Rings and Seasons of Saturn
Image Credit & Copyright: Damian Peach/SEN

Explanation: On Saturn, the rings tell you the season. On Earth, Wednesday marks an equinox, the time when the Earth's equator tilts directly toward the Sun. Since Saturn's grand rings orbit along the planet's equator, these rings appear most prominent -- from the direction of the Sun -- when the spin axis of Saturn points toward the Sun. Conversely, when Saturn's spin axis points to the side, an equinox occurs and the edge-on rings are hard to see from not only the Sun -- but Earth. In the featured montage, images of Saturn between the years of 2004 and 2015 have been superposed to show the giant planet passing from southern summer toward northern summer. Saturn was as close as it can get to planet Earth last month, and this month the ringed giant is still bright and visible throughout much of the night

Lynds Dark Nebula
Rubin's Galaxy
 

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