RT @Obs_Paris: What does a Cherenkov telescope look like? Find out via pictures – https://t.co/hv8cjThUz4 #LUTH #GEPI https://t.co/JpV6ftda…

RT @Obs_Paris: What does a Cherenkov telescope look like? Find out via pictures – https://t.co/hv8cjThUz4 #LUTH #GEPI https://t.co/JpV6ftda…