செட்னா கிரகம் பற்றிய ஆச்சர்யமூட்டும் தகவல்கள் | Planet Sedna facts in tamil | Vaan Veli | Planet

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Discovery: Sedna was discovered on November 14, 2003, by astronomers Mike Brown, Chad Trujillo, and David Rabinowitz at the Palomar Observatory.

Distance from the Sun: Sedna is one of the most distant known objects in the solar system. Its highly elliptical orbit takes it from about 76 AU (astronomical units) at its closest (perihelion) to about 937 AU at its farthest (aphelion).

Orbit: Sedna's orbital period is approximately 11,400 years, making its journey around the Sun incredibly slow compared to the planets.

Size: Sedna's diameter is estimated to be around 1,000 kilometers (620 miles), though its exact size is uncertain. This places it in the category of potential dwarf planets.

Surface and Color: Its surface appears reddish due to a coating of organic compounds known as tholins, similar to some other outer solar system bodies.

Temperature: Sedna is extremely cold, with surface temperatures averaging around -240°C (-400°F).

Significance: Sedna's unusual orbit suggests it might have been influenced by an unknown large object, like the hypothesized "Planet Nine," or by gravitational interactions with stars in the early solar system.




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Santhosh

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