Date in year · 2005 · The 2000s
On January 5, 2005, the dwarf planet Eris is discovered by Palomar Observatory-based astronomers, later motivating the International Astronomical Union (IAU) to define the term planet for the first time. The year's #1 song was "We Belong Together" by Mariah Carey. Jack Hinshelwood, Danielle Marsh, Antonio Nusa would arrive in the same year.
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2005
2000s
Featured · January 5, 2005
Eris is the most massive and second-largest known dwarf planet in the Solar System. It is a trans-Neptunian object (TNO) in the scattered disk and has a high-eccentricity orbit. Eris was discovered in January 2005 by a Palomar Observatory–based team led by Mike Brown and verified later that year.
Around 2005
2005 (MMV) was a common year starting on Saturday of the Gregorian calendar, the 2005th year of the Common Era (CE) and Anno Domini (AD) designations, the 5th year of the 3rd millennium and the 21st century, and the 6th year of the 2000s decade.
What happened
Most massive dwarf planet
Eris is the most massive and second-largest known dwarf planet in the Solar System. It is a trans-Neptunian object (TNO) in the scattered disk and has a high-eccentricity orbit. Eris was discovered in January 2005 by a Palomar Observatory–based team led by Mike Brown and verified later that year.
Elsewhere that year
The class of 2005
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