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January 2, 2009

Is Saturn losing its rings?

Posted: 01:30 PM ET

The sixth planet from the sun, Saturn, is perhaps best known for its many rings, which consist of billions of particles of ice and rock. But throughout the next several months, if you look at Saturn with a telescope, you’ll see something strange – the rings seem to be disappearing.

The Hubble Space Telescope took this image of Saturn, seen titled edge-on, in 1995.

That’s because about every 14 to 15 years, the tilt of the planet is such that we on Earth see the rings edge-on. In reality the rings are still there, but they appear nearly invisible from Earth.

The phenomenon, which stumped Galileo in the 1600s, is called a “ring plane crossing.” While the Earth has an equinox every six months, Saturn's are more spaced out - in fact, it orbits the sun once every 29.5 years.

The rings will appear thinner and thinner until September 4, 2009, when they will seem to have vanished. On that day, we will see the sun and Saturn only 11 degrees apart in the sky, says Linda Spilker at NASA, deputy project scientist and co-investigator on the Cassini Mission to Saturn. But beware – Saturn will be in the daytime sky, making it difficult to see so close to the sun.

Unlike a solar eclipse, the Saturn-with-thin-rings phenomenon will be visible from essentially the whole Earth, because it is so far away, Spilker says. But it will be difficult to actually see this around the exact time of the ring plane crossing in September.

The bottom line is that, while the actual ring crossing doesn’t happen until the fall, if you want to see Saturn appear to have thin rings, act fast!

According to the Sky and Telescope star-gazing guide for this week, Saturn’s rings are only 0.8° or 0.9° from edge-on. The planet rises around 10 p.m.

Read more about the ring crossing from NASA.

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Filed under: Astronomy • Saturn

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Hangtime96   January 6th, 2009 11:35 pm ET

CNN , " The Little Train That Couldn't " .... WHY ARE YOU NOT REPORTING THE 100'S OF UFO SIGHTINGS HAPPENING EVERY DAY ?????? I have come to Trust You Guys when it comes to the Truth . I Guess your told what to do , what to say and how you say it .

Franko   January 11th, 2009 8:59 pm ET

The Earth was warming, not because affected by greenhouses
Greenhouse effect is energy incoming caused, limited, and supported

Saturn loosing Rings, causing energy loss to Earth's radiation budget
Can I apply for research funds, to get accurate numbers detailing ?

Everyone researching the climate; start off Obama's Green Revolution
Shock the dead donkey of the economy back to fantasy

Franko   January 30th, 2009 12:01 am ET

Climate warming was scary enough
But now, the hole Solar System is inconveniently changing
N-body systems are unstable, ultimately we become a Black Hole
We need Black Hole sequestriation taxation

Michelle   February 15th, 2013 10:14 pm ET

Did none of you actually READ this article? Saturn is turning on its axis, making it APPEAR from the planet Earth, which is where we are, that the rings are vanishing.
It's like if you turn a paper on its side. Suddenly it's a little harder to see, but the paper is still there. Stop yelling over each-other and science a little.

Katelyn Szymczak   January 10th, 2021 11:24 pm ET

Alexandria Kennon   January 11th, 2021 1:57 am ET

I enjoy the efforts you have put in this, regards for all the great articles.

Yong Garito   January 12th, 2021 1:27 am ET

i have so many funny bones in myself that is why i would love to be a comedian,.

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