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Having said that, the environments of the two are vastly different: Venus has a very high surface temperature, no liquid water, plus extremely high atmospheric pressure and severe oxygen deprivation and other cruel natural conditions, Venus has very few possibilities. existence of life.

From this point of view, Venus and the Earth are just a pair of sisters who are "similar in appearance".

Venus has a dense atmosphere and clouds around it.

Only with the help of radio telescopes can we pass through this atmosphere and see the surface of Venus for what it is.

The atmosphere of Venus contains the most carbon dioxide, accounting for more than 97%.

Huge, corrosive acid rain often falls.

The surface temperature of Venus is as high as 500 ℃, and the atmospheric pressure is about 90 times that of the earth (equivalent to the pressure in the deep ocean of the earth 900 meters).

Like Uranus, Venus rotates in the opposite direction to other planets, from east to west.

Therefore, from Venus, the sun rises in the west and sets in the east.

The orbit of Venus revolving around the sun is an elliptical deviation that is very close to a perfect circle and does not exceed 1° and is nearly coincident with the ecliptic plane. Its orbital speed is about 35 kilometers per second, and its orbital period is about 224.70 days.

But its rotation period is 243 days, that is to say, Venus's rotation sidereal day is longer than Earth's one year.

However, according to earth standards, if one day is calculated from one sunrise to the next, a year on Venus is far less than 243 days.

This is because Venus rotates in the opposite direction; on Venus, the sunrise is in the west and the sunset is in the east; the alternation of day and night from one sunrise to the next is only 116.75 days on Earth.

The maximum angle of view between Venus and the sun on Earth does not exceed 48°, so Venus does not appear in the night sky all night.

The Chinese folk call the Venus at dawn as the morning star, and the Venus at the evening as the Chang Gung star.

Venus' reverse rotation may be caused by Venus colliding with other asteroids a long time ago. In addition to this unusual retrograde rotation, Venus is a little unusual.

Venus' rotation period and orbit are synchronized, so that when the two planets are at their closest, Venus always faces Earth from the same side (occurs every 5.001 Venus days). This may be the result of tidal locking -- when two planets get close enough, tidal forces affect Venus' rotation.

Of course, it could also be just a coincidence.

Basic parameters:

Mass: 4.869×1024kg.

Density: 5.24 grams/cubic centimeter.

Revolutionary period: 224.701 days.

Brightness: -3.8～-4.9 etc.

Distance from the Sun: 0.7255305 AU.

Average orbital velocity: 35.03 km/s.

The ascending node ecliptic longitude: 76.3°.

Peripheral longitude: 131°.

Orbital eccentricity: 0.007.

Orbital inclination: 3.395 degrees.

Equatorial radius: 6051.8 km.

Mass ratio (Earth mass = 1): 0.8150.

Rotation period: 243.01 days.

Number of satellites: 0.

Radius of revolution: 108208930km (0.72 AU).

Surface area: 460 million square kilometers.

Surface gravitational acceleration (gravity): 8.78m/s2.

Escape velocity: 10.4 km/s.

Surface temperature: minimum temperature 465℃, average temperature 475℃, maximum temperature 485℃.

Astral structure 7

There is no direct data on the internal structure of Venus. It is calculated from the theory that the internal structure of Venus is similar to that of the Earth. It has an iron-nickel core with a radius of about 3100 kilometers. The middle layer is mainly composed of silicon, oxygen, iron, The "mantle" is composed of compounds such as magnesium, and the outer layer is a very thin "shell" mainly composed of silicon compounds.

Scientists speculate that the internal structure of Venus may be similar to that of the earth. According to the structure of the earth, the main components of Venus’ mantle are silicates mainly composed of olivine and pyroxene, as well as a layer of silicate-based crust, and the center is composed of iron and nickel. alloy core.

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Chapter 206 Announcement of Reverse Time Frame Attack