What planet is considered the twin of neptune?

Answer 1

The planet known for being the Earth's twin is the planet Venus.

Venus is a near twin of Earth in size and mass but is completely enveloped by thick clouds of concentrated sulfuric acid droplets. Its surface gravity is about 90% that of Earth. Its atmosphere is over 96% carbon dioxide, with a pressure about 95 times Earth's.

Answer 2

Venus is known as the twin planet of Earth because Venus and Earth are similar in size and some other attributes.

Similarities:

• Earth is only 5% larger by radius.
• They are similar distances from the Sun, Venus being closer at .72 times Earth's distance.
• Orbital velocities are similar, Venus being 18% greater while its orbital period is only 61% that of Earth, i.e. .61 years.
• Density of Venus is 95% of Earth's density, so size and composition are similar.
• Both are "rocky" planets and both have atmospheres. (Mercury and Mars have very little atmosphere.)
• Gravity at the surface of Venus is only 10% less that Earth's.
• Both planet's have a metal core at least partially molten.
• Both experience the "greenhouse effect" heating the atmosphere. (See temperature below for the consequence higher carbon dioxide levels.)
• Both Venus and Earth experience lightning produced in their clouds.
• Both Venus and Earth have nearly circular orbits, among the most circular of all planets.

Differences are important:

• A day on Venus is 117 days on Earth.
• Atmospheric pressure on Venus is 92 times Earth's, i.e. 92 atmospheres.
• Venus rotates backwards and spins on its axis opposite to other planets.
• Venus has a surface temperature of 735 K (462 °C; 863 °F). The greenhouse effect with the dense atmosphere and clouds creates the extreme temperature.
• The atmosphere on Venus is over 96% carbon dioxide.
• There is virtually no water on Venus.
• Temperature on Venus is the same night and day and on the poles and equator and there are no seasons.
• Venus has almost no magnetic field and hence lacks this protection against the cosmic radiation that Earth enjoys.
• The small magnetic field Venus does have does not arise from the geodynamo effect as it does in Earth's core. Venus has no geodynamo.
• Earth has a moon and Venus does not, though it probably used to have one.
• Plate tectonics does not occur on Venus in the way that crustal plate migrate on Earth. Instead, the surface undergoes a nearly planet-wide restructuring at intervals estimated to be a few hundred million years.
• Venus rotates very very slowly, with the speed of the surface at the equator being only 6.5 km/hour compared to Earth's 1,670 km/hr.

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Answer 3

It is Uranus.

Answer 4

Neptune.