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Planet X
by Paul Schlyter
The Nine Planets:
Hypothetical Planets
The third search for Planet X began in April 1927. No progress was made in 1927-1928. In December 1929 a young farmer's boy and amateur astronomer, Clyde Tombaugh from Kansas, was hired to do the search. Tombaugh started his work in April 1929. On January 23 and 29, Tombaugh exposed the pair of plates on which he found Pluto when examining them on February 18. By then Tombaugh had examined hundreds of plate pairs and millions of stars... Tombaugh continued his search another 13 years, and examined the sky from the north celestial pole to 50 deg. south declination, down to magnitude 16-17, sometimes even 18. Tombaugh examined some 90 million images of some 30 million stars over more than 30,000 square degrees on the sky. He found one new globular cluster, 5 new open star clusters, one new supercluster of 1800 galaxies and several new small galaxy clusters, one new comet, about 775 new asteroids -- but no new planet except Pluto. Tombaugh concluded that no unknown planet brighter than magnitude 16.5 did exist -- only a planet in an almost polar orbit and situated near the south celestial pole could have escaped his detection. He could have picked up a Neptune-sized planet at seven times the distance of Pluto, or a Pluto-sized planet out to 60 a.u.

[my emphasis]

'Planet Xena' has a sidekick: Gabrielle
AP
Posted on 10/01/2005 6:35:34 PM PDT by jmc1969
http://www.freerepublic.com/focus/f-news/1495045/posts

Astronomers claim discovery of 10th planet in solar system
Outlook | July 30,2005 | AFP
Posted on 07/30/2005 12:09:55 AM PDT by Srirangan
http://www.freerepublic.com/focus/f-news/1453658/posts

Astronomers Find a New Planet in Solar System
The New York Times | 7/29/05 | KENNETH CHANG
Posted on 07/29/2005 3:35:26 PM PDT by Right Wing Professor
http://www.freerepublic.com/focus/news/1453462/posts

Big-orbit Object Confounds Dynamicists
Source: Sky & Telescope Magazine
Published: Thursday, April 5 2001 Author: J. Kelly Beatty
Posted on 04/07/2001 11:46:54 PDT by vannrox
http://www.freerepublic.com/forum/a3acf609e1367.htm

Distant object found orbiting Sun (Planet X aka 'Nibiru' Found by American Astronomers)
BBC | July 29, 2005 | Dr David Whitehouse
Posted on 07/29/2005 10:11:24 PM PDT by ThoreauHD
http://www.freerepublic.com/focus/f-news/1453628/posts

Far-out worlds, just waiting to be found
New Scientist | 23 July 2005 (issue date) | Stuart Clark
Posted on 07/20/2005 10:54:18 PM PDT by SunkenCiv
http://www.freerepublic.com/focus/f-chat/1447339/posts

Large New World Discovered Beyond Neptune
space.com | 07-29-05 | WestVirginiaRebel
Posted on 07/29/2005 1:42:31 PM PDT by WestVirginiaRebel
http://www.freerepublic.com/focus/f-news/1453403/posts

Massive Object Calls Planet Discoveries into Question
Space dot com (via Yahoo) | Thu, Jan 20, 2005 | Robert Roy Britt
Posted on 01/21/2005 9:19:56 AM PST by SunkenCiv
http://www.freerepublic.com/focus/f-chat/1325494/posts

Mysterious deep-space object raises questions on Solar System's origins
PhysOrg | December 13, 2005 | AFP
Posted on 12/14/2005 10:12:29 AM PST by SunkenCiv
http://www.freerepublic.com/focus/chat/1540338/posts

NASA Funded Scientists Discover Tenth Planet
NASA.gov | 7.29.05 | Jane Platt
Posted on 07/29/2005 6:21:26 PM PDT by gopwinsin04
http://www.freerepublic.com/focus/f-news/1453550/posts

New Planet Discovered Beyond Pluto
the Proctoscope | 07/30/2005 | donprocto
Posted on 07/30/2005 4:26:35 AM PDT by donprocto
http://www.freerepublic.com/focus/f-bloggers/1453688/posts

Out of this world: magazine launches name-the-planet initiative
Yahoo News | Tue Aug 2, 2005 | AFP
Posted on 08/02/2005 4:19:06 PM PDT by Nachum
http://www.freerepublic.com/focus/f-news/1455675/posts

Planet or Not, Pluto Now Has Far-Out Rival
New York Times | July 30, 2005 | KENNETH CHANG and DENNIS OVERBYE
Posted on 07/30/2005 4:50:22 AM PDT by infocats
http://www.freerepublic.com/focus/f-news/1453694/posts

Pluto Has Three Moons, Hubble Images Show
ap on Yahoo | 10/31/05 | Alex Dominguez - ap
Posted on 10/31/2005 6:22:32 PM PST by NormsRevenge
http://www.freerepublic.com/focus/f-news/1513000/posts

Plutocracy (A planet dethroned)
National Review | March 16, 2004 | John Miller
Posted on 03/16/2004 12:00:25 PM PST by presidio9
http://www.freerepublic.com/focus/f-news/1099017/posts

Rethinking the Planets
Popular Science | January 2006 issue (I believe) | Michael Stroh
Posted on 12/28/2005 2:36:18 PM PST by SunkenCiv
http://www.freerepublic.com/focus/chat/1548344/posts

Rogue Planet Find Makes Astronomers Ponder Theory
CNN / Reuters | October 5, 2000 | Maggie Fox
Posted on 12/28/2005 1:02:23 PM PST by SunkenCiv
http://www.freerepublic.com/focus/f-chat/1548304/posts

Scientists discover moon orbiting so-called 10th planet (nicknamed 'Xena')
ap on Monterey Herald | 10/1/05 | Alicia Chang - ap
Posted on 10/01/2005 5:10:46 PM PDT by NormsRevenge
http://www.freerepublic.com/focus/f-news/1495009/posts

Spitzer Sees the Aftermath of a Planetary Collision
Universe Today | Jan. 10, 2005 | Dolores Beasley and Gay Yee Hill
Posted on 01/13/2005 8:50:18 PM PST by SunkenCiv
http://www.freerepublic.com/focus/f-chat/1320521/posts
8 posted on 07/20/2005 10:41:05 PM PDT by SunkenCiv
http://www.freerepublic.com/focus/f-chat/1320521/posts?page=8#8

Stellar encounters as the origin of distant Solar System objects in highly eccentric orbits
Nature Magazine | Dec 2/ 2004 | Scott J. Kenyon and Benjamin C. Bromley
Posted on 12/02/2004 4:51:41 PM PST by nicollo
http://www.freerepublic.com/focus/f-chat/1293171/posts

System of three stars harbors newfound world
MSNBC.MSN.com | July 13, 2005 | By Michael Schirber
Posted on 07/15/2005 4:08:14 AM PDT by eagle11
http://www.freerepublic.com/focus/f-news/1443405/posts

Tenth Planet Has a Moon!
Space and Earth science | October 03, 2005 | E-Mail Newsletter
Posted on 10/22/2005 9:33:39 PM PDT by vannrox
http://www.freerepublic.com/focus/f-chat/1507542/posts



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