Questions about constellations

2. The ecliptic: Astronomically, it refers to the annual apparent motion track of the sun on the celestial sphere, that is, the great circle of the sun's apparent path in the sky, which is called the "ecliptic", that is, the projection of the earth's orbital plane on the celestial sphere.

Zodiac: The sun rotates once a year on the celestial sphere along the ecliptic. In order to determine the position, people divide the ecliptic into twelve equal parts (each part is equivalent to 30 parts), and each part is named after an adjacent constellation. These constellations are called the zodiac or the zodiac. This is equivalent to dividing a year into twelve segments, in which the sun enters a constellation. In the west, when a person is born, which constellation the sun is going to, he is said to belong to this constellation.

3. Altair: Vega Aquila: Lyra is about 27 light-years away from the earth, and the distance between Altair and Vega is 14 light-years.

Sirius: Canis major

2) Su Shi's "Jiangchengzi Mizhou Hunting"

I am a teenager. The left side leads to yellow and the right side leads to blue. Golden hat, mink and fur, thousands of riding rolls and leveling posts. In order to repay the people of the whole city for following my generous hunting proposal, I will shoot this tiger myself like Sun Quan.

The wine is full and the box is still open. What's wrong with the slight frost on the temple? Hold a festival in the clouds, when to send the phoenix hall. I will make my strength as full as the full moon, full as the full moon, heading northwest and shooting at the team in West Xia Jun.

5. Meteors are the light trails produced by dust particles and solid blocks (meteoroids) in interplanetary space breaking into the earth's atmosphere and rubbing with it. If they are not completely burned in the atmosphere, they are called "meteorites" or "meteorites" after falling to the ground.

6. Perseus, Andromeda, Cepheus, Cassiopeia, Pegasus and Cepheid Variable Stars

See /bbs/read.php for details? Tid=3076, too many to get.