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.
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Source: Wikipedia (CC BY-SA)
On January 5, in the year 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.
Eris is the most massive and second-largest known dwarf planet in the Solar System.
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Why January 5, 2005 matters:
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.
What began on this day left a lasting mark on history. The effects were felt immediately and continued to shape events, ideas, and lives long afterwards.
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Historical context: January 5, 2005
The 21st century has already seen profound shifts: the digital revolution has connected billions while reshaping politics and culture; climate change has emerged as a defining crisis; and new powers have risen to challenge the world order that followed the Cold War.
The event on this day: 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.
Source: https://en.wikipedia.org/wiki/Eris_(dwarf_planet) (Wikipedia, CC BY-SA)
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