Just updated on #StratoCat important events and dates of #scientific ballooning history that occurred in #April

- Victor #Hess discovers #cosmic rays
- Astronomical observations from 43.000 ft by Audouin #Dollfus
- First data gathering flight for BAMM-II program
- Soviet airborne laser system damage a stratospheric balloon over #Volsk
- First hot air #balloon flight across the English Channel

...and much more

https://stratocat.com.ar/otd/indexe.html