ATV-3 and the ISS thrusters firing
ATV Edoardo Amaldi docked with the ISS firing thrusters as part of the station's reboosting process. ATV-3 is cruicial for this process, which puts the ISS back into a higher orbit. Over time, the drag forces acting on the station bring it closer to Earth, so these reboosting procedures allow it to remain in orbit for a much greater time.
André is onboard the ISS as part of ESA's long duration mission, PromISSe. For further information on the mission, please visit: www.esa.int/SPECIALS/PromISSe/index.html