Glossary term: Near Earth Objects
Description: In addition to the Sun and planets, our Solar System contains numerous smaller bodies, notably asteroids and comets. An asteroid or comet colliding with Earth can have disastrous consequences. None of the objects we know is on a collision course with Earth, but there are a number it makes sense to keep an eye on, nonetheless. Any asteroid or comet that, on its orbit, comes closer to the Sun than 1.3 times the Earth–Sun distance is called a Near-Earth Object (NEO). Most NEOs are Near-Earth Asteroids (NEAs), although some are Near-Earth Comets (NECs; only comets with periods less than 200 years are counted). Larger objects that come closer to Earth's orbit than 5% of the Earth–Sun distance are called Potentially Hazardous Objects (PHOs); most are Potentially Hazardous Asteroids (PHAs).Related Terms:
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Term and definition status: This term and its definition is still awaiting approval
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