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The Cassini Division is a dark gap between these structures orbiting the sixth planet |
the rings (of Saturn)
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$800 |
DJ |
ASTRONOMY |
2012-10-17 |
#6458 |
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In 1979 these were discovered around Jupiter; Saturn has them too |
rings
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$400 |
DJ |
ASTRONOMY |
2007-11-27 |
#5342 |
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By examining these in some trees, you can figure out what the weather was like thousands of years ago |
the rings
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$400 |
DJ |
OUR TROUBLED PLANET |
2004-11-15 |
#4646 |
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Observations by astronomer James Elliot in 1977 discovered 5 of these around Uranus |
rings
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$200 |
J |
THE PLANET URANUS |
2002-12-27 |
#4220 |
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Neptune also has these features, including LeVerrier & Adams; only Saturn's can be seen through a small telescope |
rings
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$200 |
DJ |
THE SOLAR SYSTEM |
2000-10-03 |
#3697 |
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Earth-based observations in 1977 discovered these around Uranus |
rings
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$300 |
J |
ASTRONOMY |
1994-04-21 |
#2229 |
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When Uranus occulted a star in 1977, the star's blinking light indicated Uranus had these |
rings
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$400 |
DJ |
THE PLANETS |
1992-12-23 |
#1913 |
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Saturn's Cassini division is a division in these |
the rings
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$600 |
DJ |
ASTRONOMY |
1991-12-23 |
#1686 |
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1/3 of the planets in our solar system feature these; Voyager 2 found Uranus' |
rings
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$800 |
DJ |
THE SOLAR SYSTEM |
1991-10-02 |
#1628 |