Abstract: A stratospheric airship includes a nonrigid balloon equipped with a solar generator arranged on the upper part of the nonrigid balloon intended to be illuminated in flight by the sun, the airship comprising: at least one device for managing the position of the centre of gravity of the airship; at least one device for stabilizing the attitude of the airship; and a module for the coupled control of the devices, configured to control the airship, when the speed of travel of the airship with respect to the surrounding air is below a first threshold (S1) and/or the temperature of the solar generator is above a second threshold (S2), in such a way that it rotates by substantially half a turn about its longitudinal axis (AL), so as to protect the solar generator from illumination by the sun.

Abstract: A stratospheric airship includes a nonrigid balloon equipped with a solar generator arranged on the upper part of the nonrigid balloon intended to be illuminated in flight by the sun, the airship comprising: at least one device for managing the position of the centre of gravity of the airship; at least one device for stabilizing the attitude of the airship; and a module for the coupled control of the devices, configured to control the airship, when the speed of travel of the airship with respect to the surrounding air is below a first threshold (S1) and/or the temperature of the solar generator is above a second threshold (S2), in such a way that it rotates by substantially half a turn about its longitudinal axis (AL), so as to protect the solar generator from illumination by the sun.

Abstract: A device for permanently maintaining the altitude of a payload the altitude-maintenance energy source of which is practically permanent and extracted from the medium includes at least two gliding bodies connected together by at least one physical link and being, in use, at different altitudes relative to the ground and for which the instantaneous winds have, practically permanently, different characteristics, and further includes a system for controlling the respective attitudes of these two bodies.

Abstract: A method for capturing a container of planet ground samples moving in space by a probe also moving in space includes, when the probe is on the orbit of the container, at a distance of a few meters therefrom and the receiving face of the probe is oriented toward the container, generating, on board the probe, a first controlled magnetic field to reduce the angular speeds of the container and orient it in a preferred direction for the capture, and, when these speeds have become negligible and the probe is positioned in the correct orientation, while the probe is being brought closer to the container, a process of attraction of the container relative to the probe is begun using another field whose field lines converge toward the capture zone of the probe.

Abstract: A method for capturing a container of planet ground samples moving in space by a probe also moving in space includes, when the probe is on the orbit of the container, at a distance of a few meters therefrom and the receiving face of the probe is oriented toward the container, generating, on board the probe, a first controlled magnetic field to reduce the angular speeds of the container and orient it in a preferred direction for the capture, and, when these speeds have become negligible and the probe is positioned in the correct orientation, while the probe is being brought closer to the container, a process of attraction of the container relative to the probe is begun using another field whose field lines converge toward the capture zone of the probe.

Abstract: A device for permanently maintaining the altitude of a payload the altitude-maintenance energy source of which is practically permanent and extracted from the medium includes at least two gliding bodies connected together by at least one physical link and being, in use, at different altitudes relative to the ground and for which the instantaneous winds have, practically permanently, different characteristics, and further includes a system for controlling the respective attitudes of these two bodies.

Abstract: The invention provides a system and method of providing protection against the effects of protons of solar origin, so as to make it possible for a start sensor to be reconfigured. The system detects the arrival of an eruption of solar origin protons, supplies a control signal and triggering operation of the second star sensor in tracking mode on the basis of attitude data supplied by the first star sensor.