Astronaut-Educator Ricky Arnold Conducts Science on Station por yoda | 8 mayo, 2018 - 1:18 pm |8 mayo, 2018 Astronomy Photos Astronaut-Educator Ricky Arnold Conducts Science on Station Astronaut-educator Ricky Arnold conducts student-designed science on the Space Station. Get The Details… NASA Image of the Day Powered by WPeMatico Spread the love Etiquetado Astronomy photo.Enlace para bookmark : Enlace permanente.