Chadwick A. "Chad" Trujillo (born November 22, 1973), is the co-discoverer of Eris, which he claims to be the Tenth Planet. November 22 is the 326th day (327th on leap years) of the year in the Gregorian calendar. ... 1973 (MCMLXXIII) was a common year starting on Monday. ... Eris (IPA pronunciation ) or ), also designated (136199) Eris or 136199 Eris (See Minor planet names), is the largest known dwarf planet in the solar system. ... This article is about the historical speculation about the existence of a tenth planet in the solar system while Pluto was considered a planet. ...

Trujillo works with computer software and has examined the orbits of the numerous trans-Neptunian objects (TNOs), which is the outer area of the solar system that he specialized in. In late August, 2005, it was announced that Trujillo, along with Michael E. Brown and David L. Rabinowitz), had discovered Eris. This was the first TNO known to be larger than the planet Pluto. Later in 2005, the TNO was revealed to have a moon. A trans-Neptunian object (TNO) is any object in the solar system that orbits the sun at a greater distance on average than Neptune. ... 2005 (MMV) was a common year starting on Saturday of the Gregorian calendar. ... Michael (Mike) E. Brown (born c. ... David Lincoln Rabinowitz (born 1960) is a researcher at Yale University studying the Kuiper belt and the outer solar system. ... Eris (IPA pronunciation ) or ), also designated (136199) Eris or 136199 Eris (See Minor planet names), is the largest known dwarf planet in the solar system. ... Atmospheric characteristics Atmospheric pressure 0. ... 2005 (MMV) was a common year starting on Saturday of the Gregorian calendar. ...

Early career

Trujillo attended Oak Park and River Forest High School in Oak Park, Illinois. He received his B.Sc. in physics from the Massachusetts Institute of Technology in 1995, and was a member of the Xi chapter of Tau Epsilon Phi, and received his Ph.D. in astronomy from the University of Hawaii in 2000. Oak Park and River Forest High School, or OPRF, is a public four-year high school located in Oak Park, Illinois, a western suburb of Chicago, Illinois, in the United States. ... Wrights home in Oak Park, Illinois Lake Theater and shops along Lake Street. ... Physics (from the Greek, (phúsis), nature and (phusiké), knowledge of nature) is the science concerned with the discovery and understanding of the fundamental laws which govern matter, energy, space, and time. ... The Massachusetts Institute of Technology, or MIT, is a private coeducational research university located in Cambridge, Massachusetts, USA. MIT has five schools and one college, containing 32 academic departments,[2] with a strong emphasis on theoretical, applied, and interdisciplinary scientific and technological research. ... 1995 (MCMXCV) was a common year starting on Sunday of the Gregorian calendar. ... Tau Epsilon Phi (TEΦ, commonly pronounced TEP) is a predominantly American fraternity with approximately 40 active chapters, chiefly located at universities and colleges in the [Northeastern United States]. The national headquarters is currently located in Voorhees, New Jersey. ... A giant Hubble mosaic of the Crab Nebula, a supernova remnant. ... This article is about the University of Hawaii system. ... This article is about the year 2000. ...

Trujillo was later a postdoctoral scholar at Caltech, and is currently an astronomer at the Gemini Observatory in Hawaii [1]. He studies the Kuiper belt and the outer solar system. The California Institute of Technology (commonly referred to as Caltech)[1] is a private, coeducational university located in Pasadena, California, in the United States. ... The Gemini Observatory is an astronomical observatory consisting of two 8-metre telescopes at different sites. ... This article or section does not cite its references or sources. ... Artists rendering of the Kuiper Belt and hypothetical more distant Oort cloud. ... This article is about the Solar System. ...

List of discoveries

He has discovered several trans-Neptunian objects (TNOs). The last major TNO, Eris, was considered by him, his team, NASA, and many others to be the fabled Tenth Planet, but the International Astronomical Union assigned it to the new dwarf planet status. A trans-Neptunian object (TNO) is any object in the solar system that orbits the sun at a greater distance on average than Neptune. ... The National Aeronautics and Space Administration (NASA) is an agency of the United States Government, responsible for that nations public space program. ... Logo of the IAU The International Astronomical Union (French: Union astronomique internationale) unites national astronomical societies from around the world. ... Artists impression of Pluto (background) and Charon (foreground). ...

These objects include:

• Quaoar (with Brown)
• Sedna (with Brown and Rabinowitz) — possibly the first known inner Oort cloud object.
• Orcus (with Brown and Rabinowitz)
• Eris (with Brown and Rabinowitz) — first discovered TNO larger than Pluto.

Artists impression by G. Bacon of STScI / NASA 50000 Quaoar (pronounced kwah·war, kwah·wor, or kwow·ur, Tongva ) [1] is a Trans-Neptunian object orbiting the Sun in the Edgeworth-Kuiper belt. ... 90377 Sedna is a trans-Neptunian object, discovered by Michael Brown (Caltech), Chad Trujillo (Gemini Observatory) and David Rabinowitz (Yale University) on November 14, 2003. ... This image is an artists rendering of the Oort cloud and the Kuiper Belt. ... 90482 Orcus (originally known by the provisional designation 2004 DW) is a Kuiper Belt object (KBO) that was discovered by Michael Brown of Caltech, Chad Trujillo of the Gemini Observatory, and David Rabinowitz of Yale University. ... Eris (IPA pronunciation ) or ), also designated (136199) Eris or 136199 Eris (See Minor planet names), is the largest known dwarf planet in the solar system. ... Atmospheric characteristics Atmospheric pressure 0. ...

References

• Trujillo's home page