“Excited,” “nervous,” “terrified”–just three emotions described by a group of US teachers about to take a dizzying “weightless” flight all for the cause of science, naturally, the AFP reports. The 30 classroom professionals donned blue “astronaut” jumpsuits to defy gravity in the skies above California, in a project designed to help them capture the imagination of young science students. On the back of her jumpsuit, teacher Michelle Luke taped a drawing made by her pupils at Manhattan Beach Middle School, southwest of Los Angeles, showing two figures taking a giant weightless leap into space. But with only a couple of hours to go before the flight, her smile was still a little tense…