Look Into The Sky: Space Rocks 101

Rocks from Outer Space!

I have a few simple meteorites in my collection, and even though they look like small rocks, they have a huge story to tell! Meteorites are like tiny time capsules that have been traveling through the freezing darkness of space for billions of years. Most of them are broken pieces of asteroids, but some are actually chunks of the Moon or even Mars that got blasted off during a giant space crash. When they finally hit Earth's atmosphere, they move so fast that they turn into "shooting stars," getting so hot that they grow a thin, burnt skin called a fusion crust.

Iron, Stone, and Space Jewels

Not every space rock is the same, and their patterns help us tell them apart! First are Stony meteorites, which look like regular rocks but often have tiny, mysterious space-beads inside called chondrules. Next are the Iron meteorites, which are super heavy. If you cut an iron meteorite and polish it with a special liquid, a beautiful crisscross pattern appears called a Widmanstätten pattern—this pattern only forms when metal cools down incredibly slowly in space over millions of years! Finally, there are Stony-Irons, which look like silver metal frames holding glowing green crystals.

A Quick Trip to the Moon and Mars

The most incredible thing about meteorites is that some of them are actual "postcards" from other planets! Sometimes, a huge asteroid hits Mars or the Moon so hard that rocks get launched into space like a giant catapult. These rocks float around for millions of years until they get pulled in by Earth's gravity. When scientists find them, they can test the gas trapped inside to prove exactly where they came from. It is pretty mind-blowing to think that you could be holding a piece of the Red Planet in your own hand without ever leaving your backyard!

Photo credit: H. Raab (Wiki)