Ah, May 21st! A date that shines brightly in the astronomical calendar, for it marks the anniversary of a truly electrifying discovery. On this day in 1992, astronomers announced the detection of the first exoplanet orbiting a pulsar!

Picture this: It's 1992, grunge music is taking over the airwaves, and astronomers are huddled around their equipment, sifting through radio signals from the cosmos. Suddenly, they notice something peculiar about PSR B1257+12, a pulsar about 2,300 light-years away from Earth.

Pulsars, you see, are the remnants of massive stars that have gone supernova. They're incredibly dense neutron stars that spin rapidly, emitting beams of radiation that we detect as regular pulses, like cosmic lighthouses. But PSR B1257+12 was doing something unexpected – its pulses were wobbling ever so slightly.

After careful analysis, astronomers Aleksander Wolszczan and Dale Frail realized that this wobble could only be explained by the gravitational tug of planets orbiting the pulsar. Not just one planet, mind you, but three! These planets, later named Draugr, Poltergeist, and Phobetor (how's that for spooky space names?), were the first confirmed exoplanets ever discovered.

Now, these aren't exactly vacation destinations. Being so close to a pulsar means they're constantly bombarded with intense radiation. Plus, they're likely "diamond worlds" – planets so dense and carbon-rich that their cores might be solid diamond. Talk about bling on a cosmic scale!

This discovery was a game-changer. It proved that planets could form around stellar remnants and opened up a whole new field of exoplanet research. Since then, we've discovered thousands of planets around other stars, but these three will always hold a special place in astronomical history.

So next time you look up at the night sky on May 21st, give a little nod to PSR B1257+12 and its diamond worlds. They may be invisible to the naked eye, but they forever changed our view of the universe!