 If you liked
Kimi wa Houkago Insomnia
|
 ...then you might like
Chi. Chikyuu no Undou ni Tsuite
|
Astronomy. There are not many recent anime out there with astronomy theme, so if you like the theme check them out.
Chi is more serious, emphasizes on historical discoveries and takes place in 15th century Poland while Insomnia is more lightweight, focuses more on photography and takes place in modern Japan.