PSR B1257+12 A We've discovered planets around sun-like stars for 20 years. But we've known of planets outside our solar system for a little longer ... they just happened to be radically different than any kind of solar system we'd conceived of. Like around the remnant of a supernova. The first exoplanet discovered still holds the record for being the least massive. PSR B1257+12 A is barely bigger than the moon, orbiting the harsh environment of a pulsar. The planets in the system were discovered in 1992 by the tug they gave on their home star. Pulsars are known as cosmic timekeepers, sometimes called the "most accurate clocks in the universe." But something was making the beat of PSR B1257+12 just a little off. It was determined that the culprits in question were two planets, including this one. A third was later found, and claims to a third were made and subsequently retracted. #info #EverythingsInfo
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