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+--- Thread: Quick quiz: How many planets are there in our solar system? (/showthread.php?tid=175454)
Quick quiz: How many planets are there in our solar system? - Onamuji - 01-17-2015
Do we count "dwarf planets" ...?
Doesn't matter.
You're probably wrong.
http://news.discovery.com/space/astronomy/at-least-two-more-planets-may-exist-beyond-pluto-150116.htm
At Least Two More Planets May Exist Beyond Pluto
...“This excess of objects with unexpected orbital parameters makes us believe that some invisible forces are altering the distribution of the orbital elements of the ETNO,” Carlos de la Fuente Marcos, with the Complutense University of Madrid, said in a press release.
“We consider that the most probable explanation is that other unknown planets exist beyond Neptune and Pluto,” he said.
...
http://www.space.com/28284-planet-x-worlds-beyond-pluto.html
"The exact number is uncertain, given that the data that we have is limited, but our calculations suggest that there are at least two planets, and probably more, within the confines of our solar system," he added.
The potential undiscovered worlds would be more massive than Earth, researchers said, and would lie about 200 AU or more from the sun — so far away that they'd be very difficult, if not impossible, to spot with current instruments.
Re: Quick quiz: How many planets are there in our solar system? - Filliam H. Muffman - 01-17-2015
Re: Quick quiz: How many planets are there in our solar system? - Paul F. - 01-17-2015
At 200 AU, the question is if they are gravitationally bound to the sun at all, or if they're "just passing through" fairly slowly...
And out of respect for Clyde Tombaugh, I still consider Pluto to be grandfathered in... Even if Dr Tyson and the IAU don't....
Re: Quick quiz: How many planets are there in our solar system? - Will Collier - 01-17-2015
Nine. And in related news, Han shot first.
Re: Quick quiz: How many planets are there in our solar system? - OWC Jamie - 01-17-2015
so far, we've positively identified and ranked a bunch.
Re: Quick quiz: How many planets are there in our solar system? - DP - 01-17-2015
I wish Eris had officially been named "Xena"...
Re: Quick quiz: How many planets are there in our solar system? - N-OS X-tasy! - 01-18-2015
The final answer will turn out to be 42.
Re: Quick quiz: How many planets are there in our solar system? - testcase - 01-18-2015
"other unknown planets exist beyond Neptune and Pluto"........
there's Goofy, Sneezy, Blitzen and Mergatroid........
8-)