1.​Virgin Galactic says hundreds of customers have signed _______ for a brief suborbital flight into space. 2.​Most satellites observing the Earth fly _______ an altitude of 600 kilometers to 800 kilometers above ground. 3.​Astronauts float _______ in space because there is no gravity in space. 4.​Zero Gravity Corp, provides people _______ a once-in-a-lifetime experience of floating in microgravity _______ parabolic flights. 5.​ _______ April 12,1961, Yuri Gagarin became the first human to go _______ space. 6.​Some meteorites are easy to overlook because they look _______ ordinary earth rocks. 7.​A popular pastime while orbiting Earth is simply looking _______ the window. 8.​On 31 May he carried _______ checks on the KiboJEM Robotic Manipulator System. 9.​Nick was crazy _______ the universe after his visit to the Space Museum in Sweden. 10.​Most people have wondered if there is life beyond Earth _______ space. Giúp em với ạ