ESC - eSpace

Center

ESC - eSpace is a center of excellence at EPFL dedicated to space technologies, research, education, and innovation. It supports space-related professors and students, coordinates the Minor in Space Technologies, and guides EPFL Student Teams. eSpace collaborates closely with research laboratories and institutes at EPFL, focusing on sustainability, engineering for space science, robotics, quantum for space, earth observation, lunar mobility, and space situational awareness. Organized around three focus areas - Space Technology and Innovation, Space Science and Engineering, and Sustainable Space and Diplomacy - eSpace operates projects serving EPFL's missions in education, research, and innovation.

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Redshift

In physics, a redshift is an increase in the wavelength, and corresponding decrease in the frequency and photon energy, of electromagnetic radiation (such as light). The opposite change, a decrease in wavelength and simultaneous increase in frequency and energy, is known as a negative redshift, or blueshift. The terms derive from the colours red and blue which form the extremes of the visible light spectrum.

Actuator

An actuator is a component of a machine that is responsible for moving and controlling a mechanism or system, for example by opening a valve. In simple terms, it is a "mover". An actuator requires a control device (controlled by control signal) and a source of energy. The control signal is relatively low energy and may be electric voltage or current, pneumatic, or hydraulic fluid pressure, or even human power. Its main energy source may be an electric current, hydraulic pressure, or pneumatic pressure.

Galaxy

A galaxy is a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. The word is derived from the Greek galaxias (γαλαξίας), literally 'milky', a reference to the Milky Way galaxy that contains the Solar System. Galaxies, averaging an estimated 100 million stars, range in size from dwarfs with less than a hundred million stars, to the largest galaxies known – supergiants with one hundred trillion stars, each orbiting its galaxy's center of mass.