In autumn, the movement position of the sun under the starry sky background is ().

In autumn, the sun runs in Leo under the starry background.

Leo (Latin: Leo, astronomical symbol:? ) is a magnificent constellation in the night sky in spring, and it is also one of the zodiac signs of 12, located between Virgo and Cancer. The area of Leo is about 947 square degrees, accounting for 2.3% of the total area of the whole day, ranking 12 among the 88 constellations in the whole day.

There are 52 stars with Leo brightness greater than 5.5, the brightest star is Xuanyuan XIV (Leo α), and the apparent magnitude is 1.35. On the night of March 1 every year, Leo center passes through the transit.

Leo has been established for thousands of years. It is generally believed that in ancient Egypt more than 4,000 years ago, when the sun moved to the sky of Leo in midsummer every year, a large number of lions gathered in the Nile Valley to enjoy the cool, hence the name Leo.

Among the 48 constellations listed by the ancient Greek astronomer Ptolemy, Leo includes Leo and Ursa. In ancient times, the sky area of Houdai nationality was associated with the hair on the lion's tail. 1602, the Danish astronomer Tycho was the first to separate Leo from Ursa in his catalog.

Areas with latitudes between 82 north latitude and 57 south latitude have the opportunity to see the whole picture of Leo. Leo transits at midnight every March 1 Sunday. For mid-latitude observers in the northern hemisphere, Leo can be observed at night from the middle of winter to the end of spring, but the best observation month is April.