Shulou(Shulou.com)11/24 Report--

This article comes from the official account of Wechat: SF Chinese (ID:kexuejiaodian), by Holly Spanner (Holly Spanner), translated by Merlin, edited by Zhao Jiaming

What is "water retrograde" is Mercury retrograde.

At night, when people stand on the earth and observe the starry sky, they will find that the planets move from west to east.

On the contrary, the observed planets moving from east to west are "retrograde".

All the planets in the solar system revolve around the sun in the same direction, so on Earth, they move in the same direction in the night sky.

Because of this, the ancients were surprised to see some planets (especially Mercury) retrograde from east to west.

If you keep observing the trajectory of a planet during its retrograde period, you will find that the retrograde trajectory of the planet is usually circular or zigzag.

There are twists and turns in both the ring and the zigzag, and the planet is retrograde in the eyes of observers on Earth.

Why is Mercury retrograde? Is Mercury retrograde really retrograde as Mercury moves around the sun?

Of course not.

Mercury revolves around the sun in the same direction, whether the water is reversed or not.

Due to the different cycles of Mercury and Earth orbiting the sun, and the change in the angle of our observation, Mercury seems to be "retrogressing" in the night sky-which is actually a visual illusion.

A schematic map of the cause of Mercury retrograde (photo source: Beijing Planetarium) through the above picture, we can clearly see that Mercury moves around the sun on the inside of the earth, and it moves faster than the earth.

Combining this with the change in observation angle, during the period when Earth and Mercury move from position 1 to position 3, in the eyes of people on Earth, Mercury in the night sky moves from west to east.

Because Mercury moves faster, Mercury will catch up with and surpass Earth (that is, the period from position 3 to position 5 in the picture).

During this period, the Mercury we saw on Earth was retrograde from east to west in the night sky.

During the period from position 5 to position 7, Mercury passed the Earth and continued to orbit the sun, and the Mercury we saw was once again moving forward in the night sky.

Mercury retrograde is a common astronomical phenomenon in a year.

Sometimes, with Mercury retrograde, there will be another strange celestial phenomenon-Mercury transit.

When the sun, Mercury and the earth move in the same straight line, from the earth, there is a small black dot across the sun, this small black spot is Mercury, this celestial phenomenon is Mercury transit.

Will other planets be retrograde? the answer is yes. Other planets in the solar system, including Pluto, are retrograde.

Like Mercury's retrograde, their retrograde is not really retrograde, but an optical illusion.

If you take the Earth as the dividing line, there are some differences in the causes of retrograde between the inner planets (including Mercury and Venus) and the outer planets (including Mars, Jupiter, Saturn, Uranus, Neptune).

Venus is located on the inside of the earth, and the cause of "gold inversion" is similar to that of "water inversion", so we will not repeat it any more.

The above motion picture shows that extraterrestrial planets appear to be "retrograde" in the night sky due to differences in speed and viewing angle. (photo source: Dominic Ford in-the-sky.org) Exoplanets and Pluto are not retrograde in the same way as inner planets. They travel faster around the sun than the earth.

When the earth overtakes and surpasses them as it orbits the sun, these celestial bodies, in our view, draw a Z-shaped path in the night sky because of the change in our perspective on Earth.

A schematic diagram of the cause of Mars' retrograde (photo source: Beijing Planetarium) Let's take Mars as an example.

Mars is located on the outside of the earth and moves faster than the earth around the sun, so in the process of orbiting the sun, the earth will catch up with and surpass Mars.

It's kind of like overtaking. When you overtake the car in front, it seems that the other car is "backing up" from your car.

The situation of "fire reverse" is roughly the same.

As shown in the picture above, Earth and Mars move from position 1 to position 3. From Earth's point of view, Mars in the night sky is "forward" from west to east.

From position 3 to position 5, similar to the situation when overtaking, the earth catches up to Mars and overtakes it. At this time, Mars appears to be "retrograde" on Earth.

From position 5 to position 7, after Earth overtook Mars, Mars seemed to be "forward" again.

Extraterrestrial planets "retrograde" at the same time every year, when the planets also "rush into the sun" phenomenon.

In astronomy, sunstroke occurs when the extraterrestrial planet, the earth, and the sun move in the same straight line, when the earth lies between the extraterrestrial planet and the sun.

With the exception of Mars (because Mars strikes the sun every 26 months), other exoplanets strike the sun almost every other year.

When an extraterrestrial planet strikes the sun, it is closest to Earth, and the exoplanet looks bigger and brighter, so dating is a great time to observe extraterrestrial planets that are farther away from Earth.

Because Mercury and Venus are on the inside of the earth, they will never rush into the sun.

Will the adverse water affect the luck?

No matter whether the planets are on the inside or outside of the earth, the retrograde causes of the planets are different, and the retrograde of the planets we observe on Earth only appears to be retrograde.

This is called "apparent retrograde", these "retrograde" are not real.

Whether or not planetary retrograde really occurs, they are just ordinary astronomical phenomena and have nothing to do with people's physical and mental health, luck and so on.

It may be because all the planets in the solar system move in the night sky in the same direction, and for most of the year, the planets "go forward" in that direction, and only at certain times, the planets suddenly "retrograde".

As the saying goes, "when things are abnormal, there must be demons." the ancients may have noticed this abnormal phenomenon and imaginatively linked the "retrograde" of the planet with human tiredness, depression, and bad luck.

Mercury, in particular, has been responsible for the poor state of human beings for thousands of years.

Photo Source: NASA / Johns Hopkins University Applied Physics Laboratory / Carnegie Institution of Washington observing the retrograde schedule of the planets We have sorted out the cycles and occurrence dates of the retrograde of the planets, and combined with the specific conditions of your place, you may be able to witness the retrograde on a clear night.

Mercury is the fastest planet in the solar system, orbiting the sun for about 88 days. The cycle of Earth's orbit around the sun is about 365 days, and Mercury overtakes and surpasses Earth three or four times a year, so there are three to four "water adversaries" in a year. Mercury's next retrograde will be December 29, 2022-January 18, 2023.

The cycle of Venus around the sun is 225 days, and there is a "retrograde" every 18 months, and each retrograde lasts about six weeks. Venus will be retrograde next time: June 23, 2023-September 4, 2023.

Extraterrestrial planets are "retrograde" less often in a year and last longer each time than intraterrestrial planets.

Mars is retrograde every 26 months. About five weeks after the start of Mars retrograde, Mars will rush to the sun. Usually, Mars is retrograde for several weeks. The dazzling orange makes Mars retrograde one of the most easily observed planetary retrograde phenomena with the naked eye. The next time Mars is retrograde is from October 30, 2022 to January 12, 2023 (currently Mars is retrograde).

Jupiter is the largest planet in the solar system, which appears retrograde every 9 months or so and lasts for about 4 months. Jupiter's next retrograde time: June 28, 2022-November 23, 2022 (currently Jupiter is retrograde).

Saturn is retrograde every little more than a year, lasting about four and a half months, slightly longer than Jupiter. Saturn's next retrograde will be June 18, 2023-November 4, 2023.

The cycle and duration of Uranus's retrograde is close to that of Saturn-about every other year for five months. Uranus will be retrograde next time: August 24, 2022-January 22, 2023 (currently Uranus is retrograde).

Neptune, like Uranus and Saturn, is retrograde every other year or so, and it lasts for more than five months. Neptune's next retrograde will be from June 28, 2022 to December 4, 2022 (currently Neptune is retrograde).

Pluto was once considered an extraterrestrial planet, but astronomers now regard Pluto as a dwarf planet. Pluto is retrograde every other year, and each retrograde lasts about six months. Pluto's next retrograde will be May 1, 2023-October 11, 2023.

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