Pluto Discovered…

2) Pluto’s icy ‘heart’. Credit: NASA/JHUAPL/SWRI)

π‘­π’†π’ƒπ’“π’–π’‚π’“π’š πŸπŸ–π’•π’‰, πŸπŸ—πŸ‘πŸŽ:
On this day 91 years ago, Clyde Tombaugh was helping in the search of a ninth planet, and he succeeded. He discovered a little planet which is what we now know as Pluto.

π‘―π’π’˜ π’˜π’‚π’” 𝑷𝒍𝒖𝒕𝒐 π’…π’Šπ’”π’„π’π’—π’†π’“π’†π’…?
πŸ”­ A rich businessman named Percival Lowell, who had a passion for space and astronomy, created Lowell Observatory in Flagstaff, Arizona. When Clyde was 25, he was hired there to help out for the search of a ninth planet.
πŸ”­ Clyde was comparing some photos of a star field taken a few days apart and saw an object drifting into the backdrop of stars, which was Pluto.

π‘Ύπ’‰π’š π’Šπ’” 𝑷𝒍𝒖𝒕𝒐 𝒏𝒐 π’π’π’π’ˆπ’†π’“ π’„π’π’π’”π’Šπ’…π’†π’“π’†π’… 𝒂 𝒑𝒍𝒂𝒏𝒆𝒕?
πŸ›° The International Astronomical Union (IAU) has three criteria for a normal planet:
1. It is in orbit around the sun.
2. It has enough mass to form an almost round shape.
3.
It should not share its orbital space with other gravitationally strong objects.
πŸ›° Pluto meets the first and second criteria, but does not meet the third. Therefore in 2006, it was demoted to a dwarf planet.

π‘ͺ𝒐𝒐𝒍 𝒇𝒂𝒄𝒕𝒔 𝒂𝒃𝒐𝒖𝒕 𝑷𝒍𝒖𝒕𝒐 𝒂𝒏𝒅 π’Šπ’•π’” π’…π’Šπ’”π’„π’π’—π’†π’“π’†π’“:
🌌 Pluto is smaller than some moons, including Earth’s. Pluto has five moons: Charon, Hydra, Nix, Kerberos, and Styx.
🌌 Pluto is one third water and two thirds rock.
🌌 Clyde Tombaugh has also discovered the asteroids 4755 Nicky, 2839 Annette, 7101 Haritina, and many more.
🌌 The asteroid 1604 Tombaugh was named after him but not discovered by him, though Clyde did name some asteroids after his wife, children, and grandchildren.

π‘«π’Šπ’… π’šπ’π’– π’Œπ’π’π’˜ 𝒕𝒉𝒂𝒕 𝑷𝒍𝒖𝒕𝒐 𝒉𝒂𝒔 𝒂 β€˜π’‰π’†π’‚π’“π’•β€™?
πŸ’Ÿ Cold as it may be, Pluto does indeed have a unique icy β€˜heart’ on its surface!
πŸ’Ÿ Tombaugh Regio, (named in honor of astronomer Clybe Tombaugh) is huge heart shaped area of frozen nitrogen on Pluto’s surface, that controls its atmosphere and climate by β€˜pumping’ nitrogen winds aground the dwarf planet.

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