Tenth Planet Found

When did Pluto get reinstated?

So Holst did lay down an additional track

Rupert?

H

I thought the 'discovery' of Sedna a few years back had called into question whether there are in fact nine planets in the Solar System or just 8, with everything else being large lumps of ice/rock.

this is even more amazing
http://news.bbc.co.uk/1/hi/sci/tech/4727847.stm

I didn't think any official decision had been made regarding Pluto's proposed religation.

Anyway, I reckon a simple solution could be:

If it's round and mainly composed of rock it's a planet.

If it's shaped like a potato and mostly rock it's an asteroid.

If it's made mostly of ice then it's a comet.

quote:

Originally posted by Stephen B:
If it's round and mainly composed of rock it's a planet.

I suggest adding that a planet should be Pluto's size or larger - leaving smaller ones to be called planetoids

If it made mainly of iron will it be a Hemorrhoid?

DS

It has to be

Planet


"Mildred"

That picture of the ice lake on Mars is one of the most awe inspiring things I've ever seen. Implications for the future are just mind boggling.

quote:

Originally posted by TomK:
That picture of the ice lake on Mars is one of the most awe inspiring things I've ever seen. Implications for the future are just mind boggling.

Exclusive ice skating rink for celebs?

If you read the bit in new scientist (and the related article about another such object):

http://www.newscientist.com/article.ns?id=dn7763&feedId=online-news_rss20

http://www.newscientistspace.com/article/dn4776


it is clear that if you start to could all these Kuiper-Belt objects as planets you are looking at a 20 or so planet solar system. Personally, I don't think you should count any of them, their orbits being so radically different from all the others, they're basically just big comets.



regards,

Tam