Think you know everything about Saturn? Think again. Here are 10
facts about Saturn, some you may know, and some you probably didn’t
know.
Saturn. Image Credit: NASA/JPL/SSI
1. Saturn is the least dense planet in the Solar System
Saturn has a density of 0.687 grams/cubic centimeter. Just for comparison, water is 1 g/cm
3
and the Earth is 5.52. Since Saturn is less dense than water, it would
actually float like an apple if you could find a pool large enough. Of
course, why you’d want to ruin a pool with all that hydrogen, helium and
ices…
2. Saturn is a flattened ball
Saturn spins so quickly on its axis that the planet flattens itself
out into an oblate spheroid. Seriously, you see this by eye when you
look at a picture of Saturn; it looks like someone squished the planet a
little. Of course, it’s the rapid spinning that’s squishing it, causing
the equator to bulge out.
While the distance from the center to the poles is 54,000 km, the
distance from the center to the equator is 60,300 km. In other words,
locations on the equator are approximately 6,300 km more distant from
the center than the poles.
We have a similar phenomenon here on Earth, where points on the
equator are more distant from the center of the Earth, but on Saturn,
it’s much more extreme.
Cassini’s drawings of Saturn
3. The first astronomers thought the rings were moons.
When Galileo first turned his rudimentary telescope on Saturn in
1610, he could see Saturn and its rings, but he didn’t know what he was
looking at. He though that the rings might actually be two large moons
stuck to either side of Saturn – ears maybe?
It wasn’t until 1655 that the Dutch astronomer Christian Huygens used
a better telescope to observe Saturn. He had the resolution to realize
that the moons on either side of Saturn were actually rings: “a thin,
flat ring, nowhere touching, and inclined to the ecliptic.” Huygens was
also the first person to discover Saturn’s largest moon, Titan.
Voyager 2. Credit: NASA
4. Saturn has only been visited 4 times by spacecraft
Only 4 spacecraft sent from Earth have ever visited Saturn, and three
of these were just brief flybys. The first was Pioneer 11, in 1979,
which flew within 20,000 km of Saturn. Next came Voyager 1 in 1980, and
then Voyager 2 in 1981. It wasn’t until Cassini’s arrival in 2004 that a
spacecraft actually went into orbit around Saturn and captured
photographs of the planet and its rings and moons.
Unfortunately, there are no future plans to send any more spacecraft
to Saturn. A few missions have been proposed, including such radical
concepts as a sailboat that could traverse the liquid methane lakes on
Titan.
5. Saturn has 62 moons
Jupiter has 67 discovered moons, but Saturn is a close second with
62. Some of these are large, like Titan, the second largest moon in the
Solar System. But most are tiny – just a few km across, and they have no
official names. In fact, the last few were discovered by NASA’s Cassini
orbiter just a few years ago. More will probably be discovered in the
coming years.
6. The length of a day on Saturn was a mystery until recently
Determining the rotation speed of Saturn was actually very difficult
to do, because the planet doesn’t have a solid surface. Unlike Mercury,
you can’t just watch to see how long it takes for a specific crater to
rotate back into view; astronomers needed to come up with a clever
solution: the magnetic field.
To determine the rotational speed of Saturn, astronomers had to
measure the rotation of the planet’s magnetic field. By one measurement,
Saturn takes 10 hours and 14 minutes to turn on its orbit, but when
Cassini approached Saturn, it clocked the rotation at 10 hours and 45
minutes. Astronomers now agree on an average day of 10 hours, 32 minutes
and 35 seconds.
Saturn. NASA/JPL/Caltech
7. Saturn’s rings could be old, or they could be young.
It’s possible that Saturn’s rings have been around since the
beginning of the Solar System – around 4.54 billion years ago. Or maybe
they’re relatively brand new compared to the age of Saturn. Astronomers
still don’t fully understand the origin of Saturn’s rings.
They might have formed recently, when a 300-km ice moon was torn apart by Saturn’s gravity, forming a ring around the planet.
It’s also possible that they’re the left over material when Saturn
formed in the solar nebula. The material in the rings might have gotten
jostled by Saturn’s gravity, and never could pull together into a
cohesive Moon.
But astronomers have also found that the ring material looks just too
clean to have formed so long ago, and could be as young as 100 million
years old. It’s all just a big mystery.
Credit: NASA/JPL-Caltech/Space Science Institute
8. Sometimes the rings disappear
Well, they don’t actually disappear, but they look like they’re going
away. Saturn’s axis is tilted, just like Earth. From our point of view,
we see Saturn’s changing position as it takes its 30 year journey
around the Sun. Sometimes, the rings are fully open, and we see them in
all their glory, but other times we see the rings edge on – it looks
like they’ve disappeared. This happened in 2008-2009, and will happen
again in 2024-2025.
9. You can see Saturn with your own eyes
Saturn appears as one of the 5 planets visible with the unaided eye.
If Saturn is in the sky at night, you can head outside and see it. To
see the rings and the ball of the planet itself, you’ll want to peer
through a telescope. But you can amaze your friends and family by
pointing out that bright star in the sky, and let them know they’re
looking at Saturn.
10. There could be life near Saturn
Not life on Saturn; the planet is way too hostile to support life. But there could be life on one of Saturn’s moons: Enceladus.
Water vapour geysers on Enceladus. Credit: NASA/JPL
NASA’s
Cassini spacecraft recently discovered ice geysers blasting out of
Enceladus’ southern pole. This means that some process is keep the moon
warm enough that water can remain a liquid underneath the surface. And
wherever we find liquid water on Earth, we find life.
Lee Hadwin is a sleep artist who paints and draws whilst asleep 
Heels
have been a part of fashion for many centuries but surprisingly enough,
these elegant shoes which give extra height and posture were not solely
reserved for women. Dukes and Monarchs alike (Louis XIV in particular)
were well known for their extravagant shoes with elaborate decorations
sometimes depicting scenes of battle. Back in those days, many shoes
that were custom designed for Louis XIV boasted a heel of anywhere up to
ten inches!
Weighing
in at 164.8 pounds you can find this monstrosity at Mallie’s Sports
Grill & Bar in Southgate, Michigan for a hefty $400.
Reverend
Kevin Faist of Canada pulled a fire truck weighing 126,200 pounds the
length of the course before millions of viewers on “Live with Regis
& Kelly” in New York City
Simon Elmore of Germany broke this record in 2009 by holding 400 straws in his mouth for 10 seconds.
Achieved by Aaron Caissie from Canada, he managed to balance 17 spoons on his face at one time.
Pittsburg
Steelers Safety Troy Polamalu who is also a spokesperson for Head and
Shoulders recently had his hair insured for a mindblowing $1 million.
Zdenek
Zahradka of the Czech Republic survived 10 days buried in a coffin
underground with no food or water and only a breathing pipe connecting
him to the outside world. The previous record was 4 days.
