VIPER ("Volatiles Investigating Polar Exploration Rover"), is scheduled to take off for the moon. It has now reached a significant milestone on that journey.VIPER has over 80% of its construction completed, and all of its flight instruments are operational.Dan Andrews, the project manager for VIPER, posted on the NASA blog on Wednesday, February 28.This is a significant achievement that demonstrates the excellent work being done by the committed VIPER team, who are thrilled to see the rover come together.