What happened to the orientation of the southern constellation (Orion or any other constellation) at the same time and on different dates?

The four stars α, γ, β and κ in the constellation form a quadrilateral, and at its center, the three stars δ, ε and ζ are arranged in a straight line. These are the seven brightest stars in Orion, among which α and β are first-class stars and the rest are second-class. There are so many bright stars in a constellation, and the arrangement is so regular and magnificent. No wonder, all over the world, it is a symbol of strength, tenacity and success, and people always compare it to gods, warriors, superman and heroes.

The brightest star in Orion is alpha star, which is the sixth brightest star in the whole day. Orion β is the eighth bright star in the whole day. Every year 1 the end of February, at 8: 00 pm, the three stars of Orion are high in the southern sky, so there is a folk saying that "the three stars are shining high and the New Year is coming".

The best observation date of Orion is1from early February to early April. It rises from the southeast when it appears, and falls from the southwest after crossing the zenith. Orion α and β are extremely bright and easy to see in a cloudless night sky. However, because there are many bright stars in the winter night sky, other stars are needed to identify Orion. Usually, three stripes arranged in a straight line are used as its identification index. The brightness of these three stars is between 1.7-2.3, so they can be easily seen clearly in the sky with little light damage. α and β are located at the north and south ends with a vertical line in the middle. After figuring it out, it is found that G and κ are in the west of α and in the east of β, and the whole Orion contour has been called out!

Date and time elevation azimuth

65438+February 1 Day 2 1:00 20-45 Southeast.

65438+1 October1,2 1: 00, 45-70, and the zenith is in the southeast.

February 1 2 1:00 60-90 Tiandingnan

March 1 2 1:00 40-65 southwest and west

April 1 20:00 30-55 western topic?

Orion's most famous celestial body should be the Big Nebula. It is located in the south of Samsung, with an apparent magnitude of 4m. It looks like a white fog, which is very easy to identify.

There is also a nebula near Orion zeta. There are no stars nearby to illuminate it, and no one provides it with ultraviolet rays to make it shine. It only blocks the light from a bright nebula, so that we can see its outline-the shape of a horse's head, so this nebula is also called the Horsehead Nebula. It is a typical dark nebula.

Orion also has a meteor shower, which is located at the point where the connecting line between ζ star and α star doubles northward. Its appearance date is1October 25th 10 to 17 to 10 every year, and its peak period is 10 to 2 1. It was also caused by Halley's comet.