What is the atmosphere of Venus made up of? Naim 23:21 Astronomy What is the atmosphere of Venus made up of? A. 75% Hydrogen 25% Helium B. 25% Hydrogen 75% helium C. Oxygen D. 33% Oxygen, 47% Nitrogen, 20% Helium Answer: A Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+