Uranus constellation lookup table _ Uranus constellation lookup table device

Uranus is a planet, not a constellation, but the ruler of Aquarius.

The English name Uranus comes from Uranus (ο? ρ α ν), Cronus's father, Zeus's grandfather.

Compared with the five known planets in ancient times (Mercury, Venus, Mars, Jupiter and Saturn), Uranus is also visible to the naked eye, but it was not recognized as a planet by ancient observers because of its dark brightness, slow orbital speed and insufficient observation ability of telescopes at that time.

It was not until1781March 13 that Sir William Herschel announced the discovery of Uranus, which expanded the known boundary of the solar system for the first time and was also the first planet discovered with a telescope.

Extended data

Material composition of Uranus: Uranus is mainly composed of rocks and water-ice substances with different compositions, and its main element is hydrogen (83%), followed by helium (15%).

In many ways, Uranus (and Neptune) is different from Jupiter and Saturn, which are mostly composed of gaseous hydrogen. Its nature is closer to the core of Jupiter and Saturn, and there is no huge liquid gas surface surrounded by wooden planets (mainly formed by gravity liquefaction of metallic hydrogen compounds).

The mass of Uranus is about 14.5 times that of the earth, and it is the smallest among woody planets. Its density is1.29g/cm? It is only a little taller than Saturn, and although its diameter is similar to that of Neptune (about four times that of the earth), its mass is lower.

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