Saturn’s Rings Might Be Much Older Than Had Been Thought — VOA Learning English
Topics: наука й природа
Beginning
Recent research suggests that Saturn’s rings may be older than they look — and possibly as old as the planet itself.
Instead of being 400 million years old as some had thought, the icy rings could be the same age as Saturn: 4.5 billion years old.
A Japanese-led research team reported Saturn’s rings may be in good condition not because they are young but because they are dirt-resistant.
For many years, scientists had believed that Saturn’s rings were between 100 million and 400 million years old. This idea came from more than 10 years of observations by NASA’s Cassini spacecraft.
The spacecraft studied Saturn before its mission ended in 2017.
Images by Cassini showed no evidence of any darkening…
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