Meteorite Identification: Have you found a space rock? - Geology.com
If a suspected meteorite looks like a sponge, with lots of tiny holes, it is probably volcanic rock or slag of earthly origin. Meteorite Identification: The Magnet Test. Meteorites are divided into three basic groups: irons, stones, and stony-irons.
I think I found a meteorite. How can I tell for sure?
Meteorites are fragments of rock or metal that fall to Earth from space. They are very rare, but many people find unusual rocks or pieces of metal and wonder if they might have found a meteorite. The USGS doesn't verify meteorites, but they have several properties that help distinguish them from other rocks:
Meteors & Meteorites Facts - Science@NASA
When a meteoroid survives its trip through the atmosphere and hits the ground, it’s called a meteorite. Meteorites typically range between the size of a pebble and a fist. Most space rocks smaller than a football field will break apart in Earth’s atmosphere.
Meteorite Identification - The Meteorite Exchange, Inc.
It may have small round structures like tiny balls showing on the broken surface. These are called chondrules and many stone meteorites (the chondrites) will have them. But it will not have holes inside if it is a meteorite. Most stone meteorites will not have shiny crystals in them.
Types of Meteorites: Iron, Stone, Stony-Iron, Lunar, Martian - Geology.com
Some stone meteorites contain small, colorful, grain-like inclusions known as "chondrules." These tiny grains originated in the solar nebula, and therefore pre-date the formation of our planet and the rest of the solar system, making them the oldest known matter available to us for study.
Meteorite | Definition, Types, Identification, & Facts | Britannica
2024年10月21日 · meteorite, any fairly small natural object from interplanetary space—i.e., a meteoroid —that survives its passage through Earth’s atmosphere and lands on the surface. In modern usage the term is broadly applied to similar objects that land on the surface of other comparatively large bodies.
Tiny meteorites are everywhere — here’s how to find them
2019年2月5日 · Jon Larsen searching for micrometeorites in the Sahara Desert. Larsen went to deserts, roofs, glaciers — essentially anywhere with minimal foot-traffic — armed with a powerful neodymium magnet and...
Meteorite - Wikipedia
A meteorite is a rock that originated in outer space and has fallen to the surface of a planet or moon. When the original object enters the atmosphere, various factors such as friction, pressure, and chemical interactions with the atmospheric gases cause it to heat up and radiate energy.
Meteorites and Craters - NASA
2016年3月8日 · Stony meteorites contain small flecks of metal that are evenly distributed throughout the meteorite. The metal in a meteorite has the unusual characteristic of containing up to 7% nickel. This is a definitive test of a meteorite, but requires a chemical analysis or acid etching to detect.
Micrometeoroid - Wikipedia
A micrometeoroid is a tiny meteoroid: a small particle of rock in space, usually weighing less than a gram. A micrometeorite is such a particle that survives passage through Earth's atmosphere and reaches Earth's surface.