extra-terrestrial observation equipments 30 research of universe 16 astronomy 15 image processing 11 astronomical instruments 7 astrophysics 6 astronomical optics 6 more ... cosmic probes 6 X ray radiation 6 analysis of electroluminescent radiation 4 international cooperation 4 cosmonautics 3 radiotelescopes 3 gamma rays 3 astronomical satellites 2 extra-galactic astronomy 2 comets 2 space ships 2 interplanetary matter 2 moons 2 motions of space bodies 2 theory of catastrophes 2 Cherenkov radiation 2 Ethernet 1 Mars 1 Moon 1 telescopes 1 detection of gravitational waves 1 detection of non-thermal radiation particles 1 means of transport 1 less ...