Este fue
tu cielo.

The Decade that Defined Star System

At the start of the 1990s, our Solar System was the only known planetary system. The first exoplanetary system was discovered in 1991, orbiting a pulsar, detected by subtle changes in pulse arrival times. By mid-decade, Jupiter-like planets around Sun-like stars were found by detecting a slight wobble in their stars' motion. The image shows an artist's sketch of a planet discovered orbiting HD 209458.