Hubble Spies Exocomets Diving into Young Star

NASA's Hubble Space Telescope has detected several comets diving toward a young star about 95 light-years from Earth. The star, known as HD 172555, is approximately 23 million years old and represents the third extrasolar system where astronomers have detected such comets, according to a statement from NASA. The presence of comets falling toward HD 172555 was determined based on observations of nearby gases, which astronomers say are the vaporized remnants of disintegrated comets after they have