Ever wondered what happens inside the International Space Station during a reboost? ESA astronaut Tim Peake filmed inside during last week's firing of the Progress thrusters. <br /> <br />Even at 400 km, there are still enough molecules of the atmosphere to create some 'atmospheric drag', which causes the Station to drop by about 2 km a month. Because of this we need to raise the Station's orbit every so often. On 17 February the engines of the Progress M-29M spacecraft that is docked to aft port the Zvezda module were fired for 11 minutes. <br /> <br />The burn primarily focused on raising the Station’s perigee, making the orbit more circular. <br /> <br />Pre-reboost: 398.2 x 407.4 km - inclination 51.64° - Period: 92.62minPost-reboost: 402.1 x 406.9 km - inclination 51.64° - Period: 92.66min <br /> <br />More about the Principia mission: http://www.esa.int/principia
