Pluto and Other Dwarf Planets: Discoveries in our Solar System – Dr. Michael Brown

(March 27, 2007) From the “Evenings with Astronomers” series. In 2005, Dr. Michael Brown and his colleagues discovered 2003 UB313, now officially known as “Eris.” The discovery marked the first time in 75 years that an object larger than Pluto had been found in our Solar System. The discovery turned the astronomical world on its head. Scientists had to consider if size was the only metric by which to define a planet. The debate unleashed an avalanche of questions concerning planetary science and the role scientists play in defining the word “planet” for local and global communities.

Science Standards: Earth in the Solar System; Forces that Shape the Earth; Scientific Views of the Universe.

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Tonight observers from NASA and CIT will use LRIS-ADC and DEIMOS. Sun set 06:02:00pm rise 06:10:00am
Comet Siding Spring and Mars in a never-before-seen close passage on 10/19/14 1.usa.gov/12swEQi pic.twitter.com/JRocfaMkoe
LRIS-ADC and DEIMOS are the instruments tonight. Observers are from UCLA and UCSC. Sun set 06:04:00pm rise 06:09:00am
Here on Keck 2 the 1st of our 2 primary fields has just risen above the horizon, so we are busily collecting photons from distant galaxies.
Howdy! This is @rhaegal on Keck 2 with grad student Intae, searching for the most distant galaxies with deep spectroscopy on DEIMOS.