September marks the beginning of autumn in the northern hemisphere. There are no particular astronomical phenomena this month, but you can spend time immersing yourself in the beauty of the Milky Way on clear, moonless nights.
The time in the article has been converted to Vietnamese time
September 2 – Full Moon
The Moon is located opposite the Sun as seen from Earth, at which time the Earthward side of the Moon will be maximally illuminated. This phase takes place at 12:23 p.m. Because this full moon falls around the same time as the corn harvest, Native American tribes in the past called it the Full Corn Moon.
Full moon. Author: David Bech
September 11 – Neptune is in opposition
This giant blue planet will come very close to Earth and will be completely illuminated by the Sun. It can be observed all night when it is brighter than at any other time of the year. This is the best time to observe and photograph Neptune. However, because it is so far from Earth, the planet only appears as a tiny blue dot unless the most powerful telescopes are used.
September 17 – New Moon
From Earth, we will not be able to see the Moon because it will be on the same side of the Sun. This phase takes place at 6:00 p.m. This is the best time of the month to observe faint objects such as galaxies or star clusters as they are not obstructed by moonlight.
Quadrantid meteor shower. Author: Justin Ng
September 22 – Autumn Equinox
The autumnal equinox takes place at 8:31 p.m. At this time, the Sun will shine directly on the equator, the time of day and night is almost the same everywhere on Earth. It is also the first day of fall in the northern hemisphere and the first day of spring in the southern hemisphere.
Compilation Team: Quynh Anh, Thu Huong, Khanh Linh, Hong Nhung