Meteorites are the starting point for using AE2. They provide critical materials: budding certus blocks of various types and a Mysterious Cube in the center.

Getting Started will provide info on what to do once you find one.

Finding Meteorites

Meteorites are fairly common and leave massive holes in the ground, so you may have already found a few. if not, a Meteorite Compass will point toward the nearest mysterious cube.

Meteorite Crater

Minecraft 1.20.6 [change]