He finally received his eight-year mission Venus Express of the ESA, which lasted well beyond the design. As announced by the European Space Agency, the ship exhausted its fuel in a series of maneuvers to rise to a higher trajectory.
Since its arrival at Venus in 2006, Venus Express has been on a 24-hour elliptical orbit, traveling 66.000 km above the south pole at furthest point and 200 km above the north pole at closest approach, conducting an in-depth analysis of the planet and its atmosphere. However, after eight years in orbit and running low on fuel, the craft undertook a daring aerobraking "mission" in mid-2014, plunging deeper and deeper into the atmosphere, drawing ever closer to the planet.
Under normal circumstances, the craft would use its engines to ensure it didn't get too close to Venus, risking being lost in the atmosphere. But this particular one energy it had exactly the opposite goal: lowering altitude and exploring previously uncharted zones in the atmosphere. Also, within this mission, important experience is gained for future missions, as this method (aerobraking) can be used to enter the orbit of planets with an atmosphere without requiring a large use of fuel.
Between May and June 2014, the lowest point in the orbit of the craft reached 130-135 kilometers. The craft was then raised again, so that on July 26 it was again at a height of 460 kilometers. The mission then continued in a reduced science phase, as the craft began to "sink" again due to gravitys. A new series of maneuvers was decided to regain altitude, given that fuel was still available, with the aim of the mission lasting until 2015.
However, contact with the boat was lost on November 28. Since then telemetry and remote control links have come back in part, but they are very unstable. As Patrick Martin, the mission manager for Venus Express, said, the boat exhausted its fuel almost in the middle of planned maneuvers, resulting in loss of height control due to push problems.
Technology-Science naftemporiki.gr
