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Neptune/Earth Comparison ... Neptune Earth Ratio (Neptune/Earth) Semimajor axis (106 km) 4,495.06 149.60 30.047 Sidereal orbit period (days) 60,189. 365.256 164.79 Tropical orbit period (days) 59,799.9 365.242 163.73 Perihelion (106 km) 4,444.45 147.09 30.216 Aphelion (106 km) 4,545.67 152.10 29.886 Synodic period (days)
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nssdc.gsfc.nasa.gov/planetary/factsheet/neptunefact.htm...
nssdc.gsfc.nasa.gov/planetary/factsheet/neptunefact.html
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Neptune is so dim and distant that you can only see it with a moderately powerful telescope. But Neptune is the 4th largest planet in the Solar System. Let's ... So now, when you look through a telescope and see that tiny blue-green dot, you can get a better sense of the size of Neptune. ... Size of Neptune | Universe Today...
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www.universetoday.com/guide-to-space/neptune/size-of-ne...
www.universetoday.com/guide-to-space/neptune/size-of-neptune/
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Neptune is the eighth planet from the sun in our solar system. ... SIZE ; Neptune is about 30,775 miles (49,528 km) in diameter. This is 3.88 times the diameter of the Earth. If Neptune were hollow, it could hold almost 60 Earths. Neptune is the fourth largest planet in our Solar System (after Jupiter, Saturn, and Uranus).
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www.enchantedlearning.com/subjects/astronomy/planets/ne...
www.enchantedlearning.com/subjects/astronomy/planets/neptune/
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"For the first time, we have discovered a planetary system composed of several Neptune-mass planets", said Christophe Lovis, from the Geneva Observatory and lead-author of the paper presenting the results [1].
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www.sciencedaily.com/releases/2006/05/060518222901.htm
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Astronomers have discovered a planet about as massive as Neptune orbiting one of the most common types of stars in the universe. ... Neptune-Size Planet Orbiting Common Star Hints at Many More ; By Robert Roy Britt; Senior Science Writer; posted: 30 November 2005; 12:40 pm ET;
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www.space.com/scienceastronomy/051130_small_planet.html
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Planet hunters have found two worlds roughly the mass of Neptune, each orbiting a star within 30 light-years of our solar system. The planets are likely gaseous or mixtures of ice ... Two Neptune-Mass Planets Found, Earth-Size Worlds Next ; By Robert Roy Britt; Senior Science Writer; posted: 31 August 2004; 1:00 p.m. ET;
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www.space.com/scienceastronomy/exoplanet_pair_040831.ht...
www.space.com/scienceastronomy/exoplanet_pair_040831.html
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This image of Neptune was taken by Voyager 2's wide-angle camera when the spacecraft was 590,000 km (370,000 miles) from the planet. The image has been processed to obtain true color balance. Additional processing was used to suppress surface brightness of the white clouds. ... Name Type Width x Height Size...
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www.solarviews.com/cap/nep/wavcloud.htm
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Astronomers using telescopes in Hawaii, California and Texas have found the first Neptune-size planets outside our solar system, far smaller than any planets previously detected.
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www.physorg.com/news1018.html
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