6,000 exoplanets found beyond our solar system. Are any like Earth?

Exoplanets are planets outside Earth's solar system.

In 1995, a gas giant named 51 Pegasi b, which orbits a star similar to Earth's sun, etched its name in history as the first exoplanet ever discovered. Since then, thousands more have been found.

But amid these thousands of worlds, "There's one we haven't found – a planet just like ours," according to NASA's video about exoplanets. "At least, not yet."

In , Earth is one of but eight planets – nine if you really want to count Pluto – and the only one remotely hospitable to life.

But look beyond our sun's gravitational pull into the bounds of interstellar , and you'll find a cosmic landscape absolutely brimming with . In fact, three decades since the first exoplanet was found, NASA has recorded a milestone 6,000-plus worlds beyond our s