Monthly Archive: April 2023

The starry sky in May 2023

Due to the increasing length of the day, the useful observation times during the month of May are reduced from five hours at the beginning to just two hours at the end of the month. This would mean that the start of observations of galaxies...

The types of twilight

The different phases of twilight have an effect on the visibility of celestial bodies. During civil twilight, only the brightest stars can be seen, while more stars are visible during nautical twilight. During astronomical twilight...