Which constellations in the northern hemisphere of the earth are easy to observe in autumn?

Pegasus Poerxiusi

Dolphin Capricorn

Fairy and fairy throne

Hou Xian left Yu Nan left.

Whale water bottle

Pisces

"Flying horse in the sky, the Milky Way hanging obliquely" is a symbol of the starry sky in autumn. Patrol the autumn starry sky, you can start from the "autumn quadrangle" (also known as "flying horse-fairy box") in the direction of the head. This quadrilateral is like a square. When it is overhead, its four sides just represent one direction. The quadrangle in autumn is made up of three bright stars in Pegasus (α, β, γ) and one bright star in Andromeda (α), which is very eye-catching.

Extend the east side line of the quadrilateral to the northern sky (that is, from the gamma star of Pegasus to the alpha star of Andromeda), find the Polaris through Cassiopeia, and extend southward along this baseline to find the bright star (β) of Cetacea. This long north-south line is almost at Right ascension. It is convenient to remember and estimate the position of the stars. Extend the western line of the quadrangle to the southern sky (that is, from the beta star of Pegasus to the alpha star), and at the low altitude in the south, you can find the famous bright star in the autumn sky-Beijiao (the alpha star of Pisces), and extend northward along this baseline to find Cepheus.

From the northeast corner of the quadrangle in autumn to the northeast along Andromeda, Perseus composed of three rows of stars can be found. To the southeast of the quadrangle in autumn are Pisces and the Great Whale. Wang Xian, Hou Xian, Fairy, Perseus, Pegasus and Whale form a brilliant royal constellation, which is the main constellation in the autumn sky. To the southwest of the autumn quadrangle are Aquarius and Capricorn.

There are few bright stars in the autumn sky, but there are many deep-space objects like Andromeda Extragalactic Galaxy (M3 1).