What is the planet of the gecko and the range of the gecko s distribution

Mercury. English name: mercury

Mercury is closest to the Sun [3] and is the smallest planet in the solar system in terms of volume and mass. Often haunted at the same time as the sun, it was called "Chenxing" in ancient China. Mercury is smaller in diameter than Ganymede and Titan.

Basic parameters. Semi-major axis: 57.91 million km (astronomical units).

Revolution period: days.

Rotation direction: Rotates from west to east (counterclockwise).

Average orbital speed:

Orbital eccentricity:

Orbital inclination: °

Planetary radius: 2440 km (equator).

Mass (Earth's mass = 1):

Density: grams of cubic centimeters.

Rotation period: days.

Number of Satellites: None (still not found).

Escape speed: km s

Orbit: 57,910,000 km ( astronomical units) from the Sun

Name**. In ancient Roman mythology, Mercury was the god of commerce, travel, and theft, i.e. Hermes in ancient Greek mythology, the god of messengers to the gods, perhaps because of the speed at which Mercury moved in the sky, which gave it its name.

Probe history. Discoveries: As early as 3000 BC in Sumerian times, people discovered Mercury, and the ancient Greeks gave it two names:

When it first appears in the early morning it is called Apollo, and when it twinkles in the night sky, it is called Hermes. However, ancient Greek astronomers knew that the two names actually referred to the same star, and Heracletus (a Greek philosopher in the 5th century BC) even believed that Mercury and Venus did not orbit the Earth, but rather the Sun.

Visit: Only Mariner 10 probe has visited Mercury three times, in 1973 and 1974. It surveyed only 45% of Mercury's surface (and was unlucky, because Mercury was too close to the Sun for the Hubble Telescope to safely photograph it).

Until 1962, it was believed that Mercury would rotate one rotation at the same time as one revolution, so that the side facing the Sun would remain constant. This is very similar to the fact that the Moon always faces the Earth on the same half side. But in 1965, through observations of Doppler radar, it was found that this theory was wrong.

We have learned that Mercury rotates for two and three at the same time, and only Venus is the only known object in the solar system with a co-movement ratio of less than 1:1 between its orbital period and its rotation period, and Mercury is not.

As a result of the above, and the extreme deviation of Mercury's orbit from the perfect circle, observers on Mercury will see very peculiar spectacles, and observers at certain longitudes will see that as the Sun rises, it will gradually increase in size as it moves slowly toward the zenith. The Sun will pause at the zenith, go through a brief regression process, pause again, and then continue its journey to the horizon while shrinking significantly. During this time, the stars will streak across the sky three times as fast.

Observers at other locations on Mercury's surface will see different, but equally unusual, celestial movements.

3. All of them are mainly produced in southwest China and the south of the Yangtze River Basin; It is also distributed to Japan and North Korea. The common name of all lizards in the suborder Sauria and Gekkonidae contains about 750 species in 80 genera. It is harmless to people, but the sound is disturbing.

It is a small reptilian species, mostly nocturnal. **Soft, short and fat, large head, weak limbs and often with toe pads. Most of them are 3 15 cm (inch) long, including the tail, which accounts for half of the total length.

Adaptable to different habitats from desert to jungle; Many species often visit people's homes and feed on insects. The average life expectancy is 5-10 years.

The gecko's other physiological characteristics are similar to those of lizards, but with a slight difference, there is nothing between the ears. We can look in through one ear of the gecko and see outside directly through the other. The gecko's central nervous system is located in the spinal cord.

Most geckos have feet suitable for climbing; The toes are long and flat, and the flesh on the toes is covered with small plates; The disc is sequentially covered with tiny hairy protrusions, and the ends are forked. These hooks, which are invisible to the naked eye, adhere to irregular facets, allowing geckos to climb extremely smooth and vertical surfaces, even over smooth ceilings. Some species also have retractable claws.

Most geckos resemble snakes and have a transparent protective film on their eyes. In the common nocturnal species, the pupil is longitudinal and often divided into several lobes, forming 4 orifices when contracted. The tail may be long and pointed, short and blunt, or even spherical.

In some species, the tail can store nutrients, acting as a storehouse, allowing the animal to obtain nutrients even under unsuitable conditions. The tail can also be very brittle, and if broken, it will regenerate in its original shape. The body is usually dull yellowish-gray with gray, brown, cloudy white spots; However, the genus Phelsuma, which is native to the island of Madagascar, is bright green and active during the day.

Unlike other reptiles, geckos have a wide range of vocalizations, ranging from faint ticking and chirping to high-pitched gurgling and barking. Most species are oviparous; Egg white, hard shell; It is often found under the bark of trees or attached to the back of leaves. There are several species in New Zealand that are ovoviviparous.