Exploring Neptune: The Distant, Windy Planet

Location in the Sky
Location in the Sky
Neptune orbits far from Earth, visible in our night sky in the constellation Aquarius. It's the only planet invisible to the naked eye, requiring a telescope to observe its blue hue.
Orbiting the Sun
Orbiting the Sun
Neptune is the eighth planet from the Sun, orbiting at an average distance of about 4.5 billion kilometers (2.8 billion miles), which is 30 times farther than Earth's distance.
A Year on Neptune
A Year on Neptune
Neptune's orbital period is approximately 165 Earth years. Since its discovery in 1846, it has only completed one full orbit and is now in the midst of its second.
Extreme Seasons
Extreme Seasons
Due to its extreme axial tilt of 28.32 degrees, Neptune experiences drastic seasonal changes. Each season lasts over 40 Earth years, significantly altering its atmospheric conditions.
Neptune's Windy Nature
Neptune's Windy Nature
Neptune hosts some of the solar system's most violent weather, with supersonic winds reaching up to 2,100 kilometers per hour (1,300 miles per hour), far surpassing Earth's weather systems.
Mystery of the Moons
Mystery of the Moons
Neptune boasts 14 known moons, with Triton being the largest. Triton orbits in the opposite direction of Neptune's rotation, hinting it may have been captured from the Kuiper Belt.
Voyager 2's Historic Flyby
Voyager 2's Historic Flyby
NASA's Voyager 2 is the only spacecraft to have visited Neptune, flying by in 1989. The images it sent back revolutionized our understanding of this distant, icy world.
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Where is Neptune visible?
Constellation Aquarius
Visible to naked eye
Constellation Orion