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Neptune is so far from the Sun that high noon on the big blue planet would seem like dim twilight to us. The warm light we see here on our home planet is roughly 900 times as bright as sunlight on Neptune.
The warm light we see here on our home planet is roughly 900 times as bright as sunlight on Neptune. Namesake. The ice giant Neptune was the first planet located through mathematical calculations. Using predictions made by Urbain Le Verrier, Johann Galle discovered the planet in 1846.
Oct 3, 2024 · Neptune Observational Parameters Discoverer: Johann Gottfried Galle (based on predictions by John Couch Adams and Urbain Leverrier) Discovery Date: 23 September 1846 Distance from Earth Minimum (10 6 km) 4319.0 Maximum (10 6 km) 4711.0 Apparent diameter from Earth Maximum (seconds of arc) 2.4 Minimum (seconds of arc) 2.2 Mean values at opposition from Earth Distance from Earth (10 6 km) 4348. ...
- Mercury. When I began investigating Mercury about 20 years ago, our knowledge of its surface characteristics depended on brightness models, which in turn depended on outdated visual observations.
- Venus. Our research on Mercury was successful enough that it encouraged us to investigate other planets. I’d been recording magnitudes of Venus with a ground-based telescope and a CCD camera when I came across an unexpected feature in its phase function.
- Mars. Moving outward in the solar system, I compiled an extensive database of published Martian magnitudes dating back to the 1950s. Richard Schmude, a prolific amateur observer from the Association of Lunar and Planetary Observers, obtained many of the more recent magnitudes.
- Jupiter & Saturn. By coincidence, Jupiter also peaks at magnitude –2.94, so it ties with Mars for second place in brightness as seen from the Earth. Mercury at its brightest is about a half-magnitude fainter at –2.48, and Saturn takes fifth place.
Oct 20, 2023 · It orbits at an average distance of 2.8 billion miles (4.5 billion km), thirty times farther than Earth. Orbit around the Sun: It takes 165 Earth years for Neptune to go around the Sun...
May 16, 2024 · vs. Units of Measure: Compare All Eight Planets. Source: JPL Solar System Dynamics website. Page Updated: May 16, 2024. Neptune is the eighth and most distant planet from the Sun. It’s the fourth largest, and the first planet discovered with math.
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Oct 13, 2024 · The Great Dark Spot (centre left) is 13,000 km (8,100 miles)—about the diameter of Earth—in its longer dimension. Accompanying it are bright, wispy clouds thought to comprise methane ice crystals. At higher southern latitudes lies a smaller, eye-shaped dark spot with a light core (bottom left).
