Solar System Planet Sizes

Pluto, dwarf planet and International Astronomical Union

Astronomers Discover a Possible New Dwarf Planet in Our Solar System

Lying beyond Pluto, 2026 ED138 could be as large as 1,500 kilometers in diameter. Astronomers are still working to confirm whether it meets the criteria for a dwarf planet.

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Scientists discover new planet-like object half the size of Pluto — potentially the solar system's 6th dwarf planet

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‘It’s big’: Astronomers make startling discovery of a possible dwarf planet beyond Pluto

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Possible Sixth Dwarf Planet Was Hiding in Decade-Old Data; Rubin Algorithm Found It

Dwarf planet discovered 2026: The Vera C. Rubin Observatory has identified 2026 ED138, a trans-Neptunian object orbiting at ...

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Jupiter designed the solar system. Here's what the planet was like as a child.

Jupiter, the largest planet in the solar system, was 2 to 2.5 times bigger in its earlier life, according to new research. Credit: NASA / JPL-Caltech / SwRI / MSSS / Tanya Oleksuik Jupiter, the ...

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Pluto, dwarf planet and International Astronomical Union

Possible Sixth Dwarf Planet Was Hiding in Decade-Old Data; Rubin Algorithm Found It

Jupiter designed the solar system. Here's what the planet was like as a child.

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