NASAのインスタグラム(nasa) - 9月3日 05時50分

At Saturn, One of These Rings is not like the Others: When the sun set on Saturn's rings in August 2009, scientists on our Cassini mission were watching closely. It was the equinox -- one of two times in the Saturnian year when the sun illuminates the planet's enormous ring system edge-on. The event provided an extraordinary opportunity for the orbiting Cassini spacecraft to observe short-lived changes in the rings that reveal details about their nature. In a recent study, a team of Cassini scientists reported that one section of the rings appears to have been running a slight fever during equinox. The higher-than-expected temperature provided a unique window into the interior structure of ring particles not usually available to scientists. This result is fascinating because it suggests that the middle of Saturn's A ring may be much younger than the rest of the rings. Other parts of the rings may be as old as Saturn itself.

Credits: NASA/JPL/Space Science Institute

#nasa #cassini #saturn #planets #space #solarsystem #rings #nasabeyond #science

[BIHAKUEN]UVシールド(UVShield) 更年期に悩んだら

>> 飲む日焼け止め！「UVシールド」を購入する