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Triton is the largest natural satellite of the planet Neptune. It is the only moon of Neptune massive enough to be rounded under its own gravity and hosts a thin, hazy atmosphere. Triton orbits Neptune in a retrograde orbit—revolving in the opposite direction to the parent planet's rotation—the only large moon in the Solar System to do so.
Following capture, Triton's orbit would have been highly eccentric, circularizing post-capture to its present, nearly circular orbit. In this early eccentric state, tides raised on Triton by Neptune would have been extreme, dissipating large amounts of energy within Triton and contributing to the circularization of its orbit.
Triton follows a retrograde and quasi-circular orbit, and is thought to be a gravitationally captured satellite. It was the second moon in the Solar System that was discovered to have a substantial atmosphere, which is primarily nitrogen with small amounts of methane and carbon monoxide. [26] The pressure on Triton's surface is about 14 μbar. [26]
In 1846, Lassell discovered Triton, the largest moon of Neptune, just 17 days after the discovery of Neptune itself by German astronomer Johann Gottfried Galle, using his self-built instrument. [8] [9] [10] In 1848, he independently co-discovered Hyperion, a moon of Saturn. [9] [11] In 1851 he discovered Ariel and Umbriel, two moons of Uranus.
Triton (/ ˈ t r aɪ t ɒ n /; Ancient Greek: Τρίτων, romanized: Trítōn) is a Greek god of the sea, the son of Poseidon and Amphitrite. Triton lived with his parents in a golden palace on the bottom of the sea. Later he is often depicted as having a conch shell he would blow like a trumpet. [citation needed]
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