二十四節気

https://eco.mtk.nao.ac.jp/koyomi/faq/24sekki.html

Apollo spacecraft

https://www.hq.nasa.gov/alsj/S66-05120.jpg
from https://www.hq.nasa.gov/alsj/alsj-MissionEvents.html
Many images in https://www.nasa.gov/mission_pages/apollo/images.html
https://history.nasa.gov/diagrams/apollo.html

Super flares on solar-type stars

http://www.kyoto-u.ac.jp/static/ja/news_data/h/h1/news6/2012/120517_1.htm


https://www.nature.com/articles/nature11063
http://adsabs.harvard.edu/abs/2012Natur.485..478M

http://adsabs.harvard.edu/abs/2013PASJ...65...49S
https://www.nature.com/articles/nature11123