#NASA is testing a #solar sail: a thin, 80 m² reflective sheet that uses the pressure of reflected sunlight for propulsion. During a pass, here through #UrsaMajor/ The Big Dipper, the (slowly rotating?) #ACS3 goes from bright to invisible and back, depending on the orientation of the Sun, the sail and the observer. #SpotTheSail
@pfsmet
De vertaling van #SpotTheSail leverde hier #Zoekhetzeiltje op 🤔
Een 80 m² zeiltje 😄
