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Planetwatcher
2004-May-16, 08:55 PM
While looking up to confirm the data to anwser Algernoun's question about Saturn's shepherd moons on the site http://www.nineplanets.org/
I noticed that each of the gas giant planets are now claiming more moons then the last time we discussed the subject.

Earth still has only one, and Mars still has two,
Jupiter now has 63 total moons. http://www.nineplanets.org/jupiter.html
Saturn is up to 31. http://www.nineplanets.org/saturn.html
Uranus has 27. http://www.nineplanets.org/uranus.html
and Neptune now has 13. http://www.nineplanets.org/neptune.html
Pluto still has only one.

That brings our grand total to 138 known moons in our Solar System.

I have now become aware of a web site ran by Scott Shepherd, which is keeping track of the moons. http://www.ifa.hawaii.edu/%7Esheppard/satellites/

Spacemad
2004-May-16, 09:29 PM
How many more will Cassini add to the list of Saturnīs moons (or satellites) when it arrives to begin its Gran Tour in July?

The photos that it is now sending of the Ringed Planet are spectacular - I canīt wait to see the next "postcard" it will send! :rolleyes:

DippyHippy
2004-May-16, 09:38 PM
The Cassini page at the JPL site also keeps count of the number of Saturnian moons. http://saturn.jpl.nasa.gov/index.cfm

Cassini is going to run rings around Galileo... geddit??? Ha ha :lol:

Manchurian Taikonaut
2004-May-17, 12:14 AM
I think it's going to be great when the Europe-USA Cassini-Huygens mission probes look below the atmospheres of Titan and see the moons surface. Here's hoping that all goes well .

About the idea of more moons, here's an idea
the planetoid Sedna might have a moon
The distant object that some astronomers think could be the Solar System's 10th planet may have a moon.
The new planetary candidate, which has been named Sedna, rotates more slowly on itself than expected, suggesting it may have a satellite orbiting it.

http://news.bbc.co.uk/nol/shared/spl/hi/po...50/img/laun.jpg (http://news.bbc.co.uk/nol/shared/spl/hi/pop_ups/04/sci_nat_enl_1079433250/img/laun.jpg)

Some asteroids have moons, the asteroid Ida has a tiny moon about 1.5 Km across

zrice03
2004-May-17, 12:53 AM
You know what's funny, is that I first read Arthur C. Clarke's Rendezvous with Rama about five years ago, before all the little moons started to be found, and there is line in there saying something like "Jupiter and its fifty moons". When I first read that, I laughed and thought it was ridiculous that Jupiter could have that many moons...looks like Clarke's got the last laugh!

Planetwatcher
2004-May-17, 02:04 AM
A year or so back when the 60th moon of Jupiter was found, the same article speculated that there may be as many as 100 moons for Jupiter, and possibly 50 for Saturn. That's 12 more then the total we know of now, which means the grand total can easily top 200. :P B)

StarLab
2004-May-17, 03:07 AM
Well, what is the commonly accepted definition for a moon?
Pluto has a moon B)
Earth has a moon :(
Mars has two :angry:
Jupiter might have a bazillion :ph34r:
Ida has a moon :blink:

Tiny
2004-May-17, 04:53 PM
If they gonna update the information... I think I first thing they need to update is the textbook >< the one that I am using it let say for Jupiter only got 32 Moons...

DippyHippy
2004-May-17, 10:13 PM
They wouldn&#39;t be able to release a new copy of a textbook each time a moon is discovered because it would simply cost too much... you tend to find new editions get released every few years, or perhaps annually, when there&#39;s been enough new material to warrant spending the money on publishing a revised edition.

Planetwatcher
2004-May-18, 08:05 PM
A moon is defined as a natural satelite of a body in space. While asteroids have moons, and it is even possible for moons to have moons, we are disscussing planetary moons. <_<