202 1 astrological timetable 202 1 planetary eclipse timetable

It is the best time to observe this planet when it is blocked by the sun in a year. At this time, the planet is the brightest and most suitable for observation. So do you know the eclipse time of the planet 202 1? Then, let's reveal the timetable of 202 1 planetary eclipse by constellation knowledge.

202 1 timetable for planetary collision with the sun

August 2 14: 00, Saturn's solar eclipse, which is the best time to watch Saturn in a year.

At 8: 29 on August 20, Jupiter blocked the sun, which is the best time to see Jupiter in a year.

On September 14 17, 2 1 day, Neptune is the best time to watch Neptune in a year.

165438+1At 7: 57 on October 5, Uranus eclipsed, which is the best time to watch Uranus in a year.

brief introduction

According to the different coordinates of the celestial sphere, the solar eclipse can be divided into the ecliptic eclipse and the right meridian eclipse. The former is a common definition (the difference between the sun and the celestial body is 180). This is a good time to observe the celestial bodies around the sun, because when the celestial bodies are in the position of the sun, they just rise from the eastern horizon, and the horizon of the celestial bodies is the highest at midnight, and they don't set in the west until sunrise the next day, so they can be seen all night. At this time, the distance between celestial bodies and the earth is also the closest, and the apparent diameter is the brightest (the definition of brightest only applies to planets and asteroids).

Because the orbits of the earth and the planets are not completely round, the celestial impact near perihelion is closer to the earth, and the brightness is the brightest in all previous impacts. This kind of impact is called a big impact (for example, the Mars impact in late August 2003), and compared with other impacts, it is called a small impact or a direct impact. Theoretically, except the sun, the earth and celestial bodies in the earth's orbit (such as internal stars), all other celestial bodies can have the phenomenon of eclipsing the sun, and now most of them are celestial bodies operating in the solar system (such as exoplanets, asteroids, comets, etc.). According to the rendezvous cycle between the earth and celestial bodies, celestial bodies have one or two eclipses relative to the earth every year (only once most of the time), and the general astronomical calendar will list the eclipses of celestial bodies in the solar system.

analyse

Astronomers divide the eight planets in the solar system into two categories: based on the earth, one is the inner planet and the other is the outer planet. As the name implies, the planets in the earth are planets that run inside the earth, including mercury and venus; Extraterrestrial planets are planets orbiting outside the earth, including Mars, Jupiter, Saturn, Uranus and Neptune. Naturally, these two kinds of planets are very different in the sky. There are four special periods of planetary movement on the earth, namely downward convergence, upward convergence, eastward distance and westward distance; There are also four special periods in the movement of extraterrestrial planets, namely, rendezvous, collision, eastward illumination and westward illumination. Only the planets outside the earth will have an eclipse, and the planets inside the earth are absolutely impossible to have an eclipse.

Extraterrestrial planets are not in Earth's orbit. When the sun separates the planet from the earth by 180 degrees, it is called "combination" for short. At the same time, the planet rises and falls with the sun and is buried by the sun's brilliance, so people cannot observe it. When the longitude difference between the planet and the sun is 90 degrees, it is called a "cube photo"-the planet is called an oriental photo to the east of the sun and a western photo to the west of the sun. If the longitude difference between the planet and the sun is 180 degrees, that is, the planet sets when the sun rises and rises when the sun sets, it is called "rushing". Rushing to the sun is the best time to observe the planets.