Interesting Facts About Meteorites

A meteorite
••• meteorite image by Jim Mills from

A meteorite is a natural object originating in outer space that falls and survives impact with the surface. Meteorites can be found on Earth, but also other planets and celestial bodies including Mars and the moon. Most meteorites come from meteoroids, but many can also come from the impact of asteroids.

Sugars in Meteorites

A NASA science team found sugars in two separate meteorites in December 2001. This is significant since it points to evidence that a fundamental building block of life on Earth, sugar, may have come originally from another planet. Previously, researchers discovered other important compounds to life on Earth in meteorites which included amino acids and carboxylic acids.

Three Kinds of Meteorites

The three categories of meteorites are stony, iron, and stony-iron. Stony meteorites consist of those that are rich in silicon and oxygen with small amounts of iron, magnesium and other elements. Iron meteorites come from the metallic core of a larger parent body such as a asteroid that has melted and separated into pieces. Stony-iron meteorites also come from a larger body, but these meteorites come from the inner crust of those bodies.

The Size of Meteorites

Meteorites range in size but most meteorites are "relatively small," according to NASA. The largest meteorite recorded on Earth's surface was 60 metric tons and came crashing down on a farm near Grootfontein, Namibia.

Meteorites That Reach Our Surface

In order for a meteorite to reach the Earth's surface it must be the right size. Meteors that are too small will disintegrate in the atmosphere before ever reaching the surface. Meteors that are too big may explode before reaching the Earth's surface. According to NASA, one such large meteor exploded 6 miles above the Tunguska River in Siberia in 1908. Twenty miles of felled and scorched trees were left in its wake.

Where Meteorites Can Be Found

Meteorites are found all over the Earth's surface, but Antarctica is a great place to find meteorites. Scientists have found thousands of small meteorites within the region.

Meteorites Provide Evidence of Martian Life

NASA scientists found evidence of life on Mars from a meteorite, believed to be from Mars, that was determined to have hydrocarbons which are by-products of dead organisms on Earth, mineral phases determined to be by-products of bacterial activity and microfossils called "carbonate globules" which may be from primitive bacteria.

Related Articles

What Are Meteors Made Up Of?
Salt on Other Planets
Life on the Planet Saturn
Which Layer of the Earth's Crust Contains the Highest...
Three Major Types of Meteorites
Which Planet Has Acid Rain Fall?
How the Atmosphere Protects the Earth
Famous Meteors
Internal Structure of Neptune
What Is a Body Fossil?
Similarities Between a Comet and a Meteorite
What Are the Four Planets Closest to the Sun Called?
The Characteristics of Comets, Meteors & Asteroids
Types of Intrusive Igneous Rock With Large Crystals
Stones Found in Arizona
The Difference Between Pluto & Gas Giants
What Are the 3 Parts of the Biosphere?
Why North Dakota's Prehistoric Graveyard is Raising...
What Is the Zone Between the Earth's Core & Crust?

Dont Go!

We Have More Great Sciencing Articles!