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.
Edwin Hubble Astronomer Specialty Extragalactic astronomy Born Nov. 20, 1889 Marshfield, Missouri, U.S. Died Sep. 28, 1953 (at age 63) San Marino, California Nationality American Edwin Hubble is a world renowned astronomer who has made a significant contribution to the scientific understanding of the galaxies and the universe. His work was revolutionary in many ways, and remains the blueprint for a number of scientific laws, theories, and discoveries.