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A telescope or strong binoculars will resolve Neptune as a small blue disk, similar in appearance to Uranus. [180] Because of the distance of Neptune from Earth, its angular diameter only ranges from 2.2 to 2.4 arcseconds, [8] [20] the smallest of the Solar System planets. Its small apparent size makes it challenging to study visually.
Parts-per-million chart of the relative mass distribution of the Solar System, each cubelet denoting 2 × 10 24 kg. This article includes a list of the most massive known objects of the Solar System and partial lists of smaller objects by observed mean radius. These lists can be sorted according to an object's radius and mass and, for the most ...
In the Solar System, it is the fourth-largest planet by diameter, the third-most-massive planet and the densest giant planet. Neptune is 17 times the mass of Earth, slightly more massive than its near-twin Uranus. Neptune is denser and physically smaller than Uranus because its greater mass causes more gravitational compression of its atmosphere.
Planets of mass similar to Uranus or Neptune; smaller than the gas giants, but still much larger than Earth. TOI-332b: Sub-Neptune: a planet with smaller radius than Neptune even though it may have a larger mass HD 110067 (b,c,d,e,f and g) Mini-Neptune: Also known as a gas dwarf or transitional planet. A planet up to 10 Earth masses, but less ...
The planet may be similar in size and composition to Neptune, the smallest of our solar system's four gas planets. Neptune's diameter is about four times that of Earth.
According to the IAU's explicit count, there are eight planets in the Solar System; four terrestrial planets (Mercury, Venus, Earth, and Mars) and four giant planets, which can be divided further into two gas giants (Jupiter and Saturn) and two ice giants (Uranus and Neptune). When excluding the Sun, the four giant planets account for more than ...
Voyager 2/ISS images of Uranus and Neptune released shortly after the Voyager 2 flybys in 1986 and 1989, respectively, compared with a reprocessing of the individual filter images in this study to ...
If the Sun–Neptune distance is scaled to 100 metres (330 ft), then the Sun would be about 3 cm (1.2 in) in diameter (roughly two-thirds the diameter of a golf ball), the giant planets would be all smaller than about 3 mm (0.12 in), and Earth's diameter along with that of the other terrestrial planets would be smaller than a flea (0.3 mm or 0. ...