China News Service, Guangzhou, October 27 (Guo Jun and Li Jianji) According to the Guangzhou Wuyang Planetarium, on October 30 this year, Venus (Chang Geng Star) will appear eastward, ushering in an ideal time to observe Venus throughout the year. It is better to observe Venus in the southern hemisphere than in the northern hemisphere.
The eastward distance means that Venus is located on the east side of the sun, with the largest angular distance from the sun, and the best time to observe.
As long as the sky is clear, from now until mid-December this year, all parts of China can watch the brilliant and charming light of Venus at low altitude in the southwest as night falls.
The best observation time everywhere is 15 minutes to 75 minutes after sunset.
On October 30, the sunset time in Guangzhou was 17:50, that is, the best time to observe Venus in Guangzhou is 18:05 to 19:05.
Schematic diagram of the relative position of Venus orbiting the Earth. Photographed by Li Xuyan
Among the eight planets in the solar system, Venus is the closest to the earth, and its apparent brightness is the brightest celestial body except the sun and moon. Even during the day, you can see Venus competing with the sun.
The revolution period of Venus is about 225 days, and the rendezvous period of Venus and the earth is 584 days (the time interval between the two eastward distances of Venus).
On October 30, Venus will be at a distance of 47 degrees east from the sun. The sun, Venus and the earth form a right triangle with a right angle at Venus. Venus’s apparent brightness reaches a magnitude of minus 4.7, and it looks like Chang Gung star at night. Disregard the stars; on December 4, Venus (Chang Gung) is the brightest in the year, with magnitude reaching minus 4.9, even during the daytime visible to the naked eye; on January 9, 2022, Venus will conjunct the sun, namely the earth, Venus and the sun Arranged in a straight line, Venus is not visible; on February 13, Venus (Venus) is the brightest; on March 20, Venus is farther away from the west; on October 23, Venus is the Sun, namely the earth, sun and Venus in sequence Arranged in a straight line, Venus is not visible; on June 4, 2023, Venus will be eastward (the time between two Venus eastward distances is 584 days).
On September 19 this year, the apparent diameter of Venus was 17 arcseconds, and the phase was 0.67, which means that the public sees 67% of the apparent area of Venus illuminated by the sun in an astronomical telescope (see photos of Venus).
On October 30, Venus will be at a distance eastward, with an apparent diameter of 25 arcsec and a phase of 0.49 (in a telescope, Venus can be seen as a "half moon").
Venus will be the brightest on December 4, with an apparent diameter of 41 arcseconds and an aspect of 0.26.
On January 9 next year, Venus will conjunct the sun with an apparent diameter of 63 arcsec and a phase of 0.
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