Air source heat pump (extracts heat from outside air) Airâair heat pump (transfers heat to inside air) Airâwater heat pump (transfers heat to a heating circuit and a tank of domestic hot water) Air-air heat pumps, that extract heat from outside air and transfer this heat to inside air, are the most common type of heat pumps and the cheapest.
Confidence votes 42.4K. The Hubble Telescope was named after Edwin Powell Hubble who was an astronomer that confirmed that there were galaxies other than our own Milky Way; the discoveries of other galaxies have been repeatedly confirmed by the observations of the Hubble Telescope.
Hubble's second huge advantage is its ability to observe near-infrared and ultraviolet light, which is otherwise filtered away by the atmosphere before it can reach ground-based telescopes. Find out more about the spacecraft Hubble and see images of it in flight. Hubble has made many contributions to science since its launch in 1990. With 10 000 scientific papers attributed to it, Hubble is by some measures the most productive scientific instrument ever built. This section outlines the background to some of the key areas of research Hubble has contributed to.