Near Earth Objects

Title: Near Earth Objects
Category: Science & Technology | Words: 673 | Pages: 2.9 (approximately 235 words/page)

Near Earth Objects

Near-Earth Objects are comets and asteroids that have been pushed by the gravitational attraction of nearby planets into orbits that allow them to enter the Earth's neighborhood. They are about 4.5 billion years and can range in size from pebbles or lumps of ice, to rocky or icy worlds nearly 1,000 kilometers across. An asteroid or comet may become a Near Earth Object when its trajectory intersects the orbit of the Earth or is within 0.3 Astronomical Units (…showed first 75 words of 673 total…

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…showed last 75 words of 673 total…or slabs of iron; They are not spherical and may spin or tumble as they go. There are many subcategories of asteroids: each behaves differently when entering the Earth’s atmosphere, and in its reaction to countermeasures. Comets are essentially "dirty snow-balls" and include many particles of dust. It is only when a comet comes near the Sun that these gases evaporate, freeing the dust that forms the tail sometimes seen by the naked eye.

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