Astronomers have a new tool to help them find habitable planets in our galaxy: the Habitable Planet Finder (HPF), a high-precision spectrograph. The HPF can be used to detect worlds which have some key qualities, like being a rocky planet orbiting an red dwarf. A red dwarf, also known as an M-dwarf, is a type of star that is relatively cool, small, and dim, and is somewhat similar to our Sun (which is classified as a white or yellow dwarf.) Red dwarfs are common in the Milky Way, like the nearby Barnard’s star, making them good hunting grounds for exoplanets.
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