Dr. Chuan Chom “Venus is the brightest of the year” in the early evening on July 10, clearly visible with the naked eye. If the sky visibility is good
The National Astronomical Research Institute (Sor.Dr.) revealed that on July 10, 2023, “Venus is the brightest” for the first time this year. appears prominently in the west Since the sun goes down from about 19:00 to 21:09, it can be observed with the naked eye throughout the country. If you look through a telescope, Venus appears like a moon-like crescent. It is expected to have an apparent magnitude rating as high as -4.6 (full moon). has an apparent brightness rating of -12)
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When observing Venus through a telescope, it appears like a moon-like crescent. In addition, at this time, Regulus alongside Mars appears above Venus as well. If the visibility of the sky is good, it can be seen clearly with the naked eye all over the country.
Venus is the brightest (The Greatest Brilliancy) is when Venus orbits the appropriate distance from the Earth. and is quite large in size therefore appears very bright in the sky for another period Even Venus has a thicker crescent. but with a position far from the world The brightness therefore decreased accordingly.
that we see Venus is always a crescent. Since Venus is the second planet after Mercury orbits the Sun closer than Earth. Therefore, Venus cannot be seen fully lit up. because it will appear in full light When behind the sun, people on earth always see Venus appearing in a crescent. The thickness of the crescent varies at different orbital positions. And appears to be at the farthest 47.8 degrees from the Sun, so we can only observe Venus for a short time before the sun rises or after the sun sets. It never appears in the sky or at night.
However, if Venus is seen in the west in the early evening Thai people often call it “The star of the city” if Venus is seen in the east in the early morning. Thai people often call it “Daylight Star”
In this year 2023, Venus will appear at its brightest 2 times, namely the first time in the evening on July 10, 2023, appearing bright. clearly visible to the naked eye in the west After the sun sets until about 9:09 p.m. and the second time in the early morning on September 18, 2023, it appears bright and prominent. Clearly seen with the naked eye in the east from 3:25 a.m. until the sun rises from the horizon.
