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Four images from New Horizons' Long Range Reconnaissance Imager (LORRI) were combined with color data from the Ralph instrument to create this enhanced color global view of Pluto. (The lower right edge of Pluto in this view currently lacks high-resolution color coverage.) The images, taken when the spacecraft was 280,000 miles (450,000 kilometers) away, show features as small as 1.4 miles (2.2 kilometers), twice the resolution of the single-image view taken on July 13, 2015. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute

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Four images from New Horizons' Long Range Reconnaissance Imager (LORRI) were combined with color data from the Ralph instrument to create this enhanced color global view of Pluto. (The lower right edge of Pluto in this view currently lacks high-resolution color coverage.) The images, taken when the spacecraft was 280,000 miles (450,000 kilometers) away, show features as small as 1.4 miles (2.2 kilometers), twice the resolution of the single-image view taken on July 13, 2015. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
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AkaSci 🛰️ (akasci@fosstodon.org)'s status on Wednesday, 17-Jul-2024 08:09:48 JST AkaSci 🛰️

18 years ago in August 2006, Pluto was demoted in status from Planet to Dwarf Planet, as the International Astronomical Union (IAU) revised the criteria for a full-sized planet:
A planet was defined as a celestial body that
1. is in orbit around the Sun.
2. has sufficient mass to assume hydrostatic equilibrium (a nearly round shape).
3. has “cleared the neighborhood” around its orbit.
Pluto fails to meet the 3rd criterion.
https://www.iau.org/static/resolutions/Resolution_GA26-5-6.pdf
https://www.iau.org/public/themes/pluto/
#Pluto
1/n

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