Neptune: The farthest planet from our sun

Neptune is the farthest planet from the sun and one of two “ice giants” in our solar system† The cold, blue planet is about 30 times farther away from the sun than Earth and takes around 165 Earth years to complete a single orbit around our star. Neptune spins around its axis quicker than Earth, so a day on Neptune is only around 16 Earth hours.

When was Neptune discovered?

Scientists discovered Neptune in 1846, after they conducted orbit calculations for Uranus that indicated there was an unknown planet affecting Uranus’s gravityaccording to the Natural History Museum (opens in new tab) in London, UK Neptune isn’t visible to the naked eye, but the researchers were able to confirm the planet’s existence using a telescope. Astronomers had previously spotted Neptune through telescopes as early as 1612, but hadn’t identified it as a planet, according to NASA (opens in new tab)

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