Meteoroid

related topics
{math, energy, light}
{island, water, area}
{ship, engine, design}
{water, park, boat}
{day, year, event}
{system, computer, user}
{group, member, jewish}
{film, series, show}

A meteoroid is a sand- to boulder-sized particle of debris in the Solar System. The visible path of a meteoroid that enters Earth's (or another body's) atmosphere is called a meteor, or colloquially a shooting star or falling star. If a meteoroid reaches the ground and survives impact, then it is called a meteorite. Many meteors appearing seconds or minutes apart are called a meteor shower. The root word meteor comes from the Greek meteōros, meaning "high in the air".

Contents

Overview

Meteoroid

The current official definition of a meteoroid from the International Astronomical Union is "a solid object moving in interplanetary space, of a size considerably smaller than an asteroid and considerably larger than an atom".[1][2] Beech and Steel, writing in Quarterly Journal of the Royal Astronomical Society, proposed a new definition where a meteoroid is between 100 µm and 10 m across.[3] The NEO definition includes larger objects, up to 50 m in diameter, in this category. Very small meteoroids are known as micrometeoroids (see also interplanetary dust).

Full article ▸

related documents
Seismic wave
Physical constant
Numerical aperture
Poynting vector
Adiabatic process
Antenna gain
Geostationary orbit
Grand unification theory
Earth radius
Voltage
Cosmological constant
61 Cygni
Quantum electrodynamics
Fermion
Spontaneous emission
Speckle pattern
Electromotive force
Parsec
Sudbury Neutrino Observatory
Angle
Topic outline of physics
Work function
Astrometry
Cartesian coordinate system
Interference
Stress-energy tensor
Weakly interacting massive particles
Dimensionless quantity
Eta Carinae
Equatorial bulge