Search results
Results from the WOW.Com Content Network
A meteor air burst is a type of air burst in which a meteoroid explodes after entering a planetary body's atmosphere. This fate leads them to be called fireballs or bolides , with the brightest air bursts known as superbolides .
Meteor radars can measure atmospheric density and winds by measuring the decay rate and Doppler shift of a meteor trail. Most meteoroids burn up when they enter the atmosphere. The left-over debris is called meteoric dust or just meteor dust. Meteor dust particles can persist in the atmosphere for up to several months.
Early reentry-vehicle concepts visualized in shadowgraphs of high speed wind tunnel tests. The concept of the ablative heat shield was described as early as 1920 by Robert Goddard: "In the case of meteors, which enter the atmosphere with speeds as high as 30 miles (48 km) per second, the interior of the meteors remains cold, and the erosion is due, to a large extent, to chipping or cracking of ...
Meteors are space rocks and other material that burn up as they plummet through Earth's atmosphere, leaving a bright streak in the sky. ... they release dust and gases. Halley's Comet, named for ...
About 60 meteors pass every hour. Where do meteors come from? ... the bits of dust collide with Earth’s atmosphere, causing meteors to burn up and create bright streaks in the sky.
During a meteor shower, many meteors hit Earth's atmosphere over a short period of time. When they pass through the atmosphere, the meteors leave behind streaks of light caused by glowing, hot air.
A meteor shower results from an interaction between a planet, such as Earth, and streams of debris from a comet(or occasionally an asteroid). Comets can produce debris by water vapor drag, as demonstrated by Fred Whipple in 1951, [24] and by breakup. Whipple envisioned comets as "dirty snowballs", made up of rock embedded in ice, orbiting the Sun.
During meteor showers, many meteors travel through Earth's atmosphere over a short period. Most meteors burn up in space. The few that survive the trip and reach the ground and considered meteorites.