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Sat, Jul 14, 2007

ANN's Daily Aero-Term (07.14.07): Impact Crater

Aero-Terms!

Aero-Terms are designed to be a daily reminder of the terms, names, acronyms and explanations of the unique language that populates the aviation world. Aerospace, sport aviation, fixed wing, helo, you name it... it's all fair game.

Aero-Terms should serve as a quick but intriguing reminder of the terms you may use every day, or an introduction to an aspects of the Aero-World you may not yet be familiar with. ANN also encourages readers to go beyond the FMI link, and further research any intriguing terms.

Suggestions for future Aero-Terms are ALWAYS welcome, as are additions or discussion of the explanations given for each Aero-Term.

Impact Crater

A crater formed by the high-speed impact of a meteorite, asteroid, or comet with a solid surface. Craters are a common feature on most moons, asteroids, and rocky planets. They range in size from a few centimeters to over 1,000 km across.  On Earth, for example, craters are rapidly degraded and destroyed by weathering processes; about 120 are known, with diameters ranging from 150 m to 180 km. One of the best preserved and most impressive is the Barringer Crater, near Winslow, in northern Arizona. On Mercury, which lacks an atmosphere and is geologically inert, the landscape is peppered with craters dating back over 4 billion years.

FMI: www.daviddarling.info/encyclopedia/I/impact_crater.html

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