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OTD In Space - January 5: Discovery of Eris Ignites Pluto-Planet Debate

On January 5, 2005, astronomers at NASA discovered Eris, the second-largest dwarf planet in the solar system. Eris is just ...
Astronomy on MSN

Jan. 5, 2005: Eris is discovered

In 2003, Palomar Observatory astronomers were in the midst of their search for planet-sized objects beyond Neptune when they ...
insider.si.edu

Pluto, Eris, and the Dwarf Planets of the Outer Solar System

Full Video- http://www.youtube.com/watch?v=WHNO079G1i8 Pluto, Eris, and the Dwarf Planets of the Outer Solar System Exploring Space Lecture webcast live on Tuesday ...
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What are dwarf planets — and how many are there?

When you buy through links on our articles, Future and its syndication partners may earn a commission. An illustration of confirmed dwarf planets and their moons. From left to right: Pluto (with ...