A brief history of Saturn’s amazing rings

earthsky.org | 8/19/2019 | EarthSky Voices
Click For Photo: https://en.es-static.us/upl/2019/08/saturn-cassini-300x148.jpg

The planet Saturn was between the sun and the Cassini spacecraft – sheltering the craft from the sun’s blinding glare – when Cassini acquired this image. Cassini orbited Saturn from 2004 to 2017.

Many dream of what they would do had they a time machine. Some would travel 100 million years back in time, when dinosaurs roamed the Earth. Not many, though, would think of taking a telescope with them, and if, having done so, observe Saturn and its rings.

Astronomer - Saturn - Rings - Rings - Shape

Whether our time-traveling astronomer would be able to observe Saturn’s rings is debatable. Have the rings, in some shape or form, existed since the beginnings of the solar system, 4.6 billion years ago, or are they a more recent addition? Had the rings even formed when the Chicxulub asteroid wiped out the dinosaurs?

I am a space scientist with a passion for teaching physics and astronomy, and Saturn’s rings have always fascinated me as they tell the story of how the eyes of humanity were opened to the wonders of our solar system and the cosmos.

Galileo - Saturn - Telescope - Fame - Moons

When Galileo first observed Saturn through his telescope in 1610, he was still basking in the fame of discovering the four moons of Jupiter. But Saturn perplexed him. Peering at the planet through his telescope, it first looked to him as a planet with two very large moons, then as a lone planet, and then again through his newer telescope, in 1616, as a planet with arms or handles.

Four decades later, Giovanni Cassini first suggested that Saturn was a ringed planet, and what Galileo had seen were different views of Saturn’s rings. Because of the 27 degrees in the tilt of Saturn’s rotation axis relative to the plane of its orbit, the rings appear to tilt toward and away from Earth with the 29-year cycle of Saturn’s revolution...
(Excerpt) Read more at: earthsky.org
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