A collection of five videos dedicated to Automated Transfer Vehicles (ATV). ATVs are expendable, pressurised unmanned resupply spacecraft developed by the European Space Agency (ESA). They are designed to supply the International Space Station (ISS) with propellant, water, air, payloads, and experiments. They can also reboost the station into a higher orbit.

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ATV – Georges Lemaitres

This video explains how Lemaître theory of the Big Bang explained the measurements made from the early 20th Century until today. The presenter, Anu Ojha, explains how different elements have different spectra because of the changes in energy levels of the electrons in the atoms. Spectroscopy of many nebulae show...

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