![]() And with Neptune appearing 10 times larger than our moon, you would be able to clearly see its features. "That's different from any other moon in the solar system," Masters said. What's more, Triton's orbit around its planet is inclined, so if you were on the side of the moon that always faces Neptune, you would get a view of not just Neptune's equatorial region, but also its northern polar and southern polar regions. If you lived in a region on the moon that gets both night and day (a day on Triton is almost six Earth days), you would see the sun - which would be just a dot in the sky - rise in the west and set in the east. Because of this, Triton is the only moon in the solar system that orbits in a direction opposite to the rotation of its parent planet. Interestingly, Triton didn't form along with its parent planet, and was likely an object that Neptune captured. With an average temperature of minus 391 degrees Fahrenheit (minus 235 Celsius), Triton is the coldest- known object in the solar system. If you lived on Triton, you wouldn't get to enjoy any seasonal effects to temperature. ![]() The atmospheric pressure in Triton's southern hemisphere is estimated to have quadrupled since Voyager 2 visited the moon, but it's still 20,000 times less than Earth's surface pressure. The sunlight results in seasonal changes to Triton's surface pressure - the atmosphere thickens a bit after the sun causes frozen nitrogen, methane and carbon monoxide on Triton's surface to sublimate into gas. As Neptune makes its 165-year-long trip around the sun, the polar regions of Triton take turns bathing in the sun for some 80 years at a time.
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