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In 1992, astronomers discovered the first exoplanet in an unexpected part of the universe: around a pulsar, a rapidly rotating stellar corpse. Not many other pulsar planets have been discovered since then, and with potentially good reason: In new research detailed July 12 at the National Astronomical Meeting in the UK, astronomers are now discovering that such pulsar worlds may prove extremely rare. Here’s the background- Astronomers discovered the first known exoplanet around the pulsar PSR B1257+12 in 1992, located about 2,300 light-years from Earth in the constellation Virgo. A pulsar is a type of neutron star, the corpse of a star that dies in a cataclysmic explosion known as a supernova, whose gravity is strong enough to crush protons together with electrons to form neutrons — but not massive enough to become a black hole. The violent nature of supernovae often makes the remnants of their ancestral stars spin. A rotating neutron star can spin up to 700 times per second, emittin

View bigger. | Artist’s concept showing what some of the habitable water worlds in our Milky Way galaxy might look like. A new study shows they don’t need to all look the same. Notice the Earth on the far right. Image via NASA/Wikimedia Commons. Earthly life requires water. So scientists contemplating life outside our solar system have traditionally thought of watery exoplanets, similar to our own aquatic world. An exoplanet that is similar to Earth – in terms of atmosphere, distance to stars, mass, etc. – suggests a possible habitable world. But scientists said in late June 2022 that long-term liquid water would not have occurs under conditions similar to Earth. Exoplanets can be a little bigger and may not even be located near a star! The new study comes from researchers at the University of Bern, the University of Zürich and PlanetS’s National Center for Competence in Research (NCCR). This suggests that several different exoplanets from Earth may be able to retain liquid