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what are, long streaks of bright light caused when a meteoroid gets close to the ground as it's burning up, called???? please help

2007-01-21 11:06:14 · 11 answers · asked by Rebecca A 1 in Science & Mathematics Astronomy & Space

11 answers

I looked it up and I'm sure the answer is a Shooting Star. From Wikipedia.org: "When it enters the atmosphere, air resistance causes the body to heat up and emit light, thus forming a fireball, also known as a meteor or shooting star"

2007-01-21 11:15:53 · answer #1 · answered by Anonymous · 0 1

It's not a comet. The term you are looking for is "Bolide."

When a meteor is big enough that it takes a long time to burn up entering the Earth's atmosphere, it will generally grow a long tail and travel from horizon to horizon. Sometimes they blow up, shattering into chunks that can wobble or burst. Also, they can either crash to the ground or skip off the Earth's atmosphere back into space.

I've been lucky enough to see several, they're very pretty.

Shooting stars are much shorter lived, smaller peices of debris entering the atmosphere; they usually only last a second.

2007-01-21 19:34:49 · answer #2 · answered by ~XenoFluX 3 · 0 0

Meteorites are fragments of rock and/or metal that fall to Earth from space. Having broken away from a larger extraterrestrial body, meteorites can measure anything from a fraction of a millimetre to the size of a football pitch and bigger. Captured by Earth's gravitational force, they are accelerated to speeds of over 11.2 kilometres per second. As they enter Earth's thick gassy atmosphere they slow rapidly due to the friction and glow, flashing across the sky like a firework, before finally crashing to the ground.

Where do meteorites come from?
Most meteorites are fragments that have come away as two asteroids collide. Asteroids are irregular-shaped rocks that orbit the sun. There are thousands of asteroids in our solar system, most in an orbit between Mars and Jupiter known as the asteroid belt. The asteroid belt was formed when the solar system was born about 4,568 million years ago, from a cloud of gas, dust and ice.

A small proportion of meteorites come from the moon and the planet Mars. These meteorites are much younger than those from asteroids, some as young as 2500 million years and 180 million years old respectively. We know where they have come from because their composition is very similar to moon rock brought back from the Apollo lunar mission and martian soil from the Viking probe.

Where are meteorites found?
Although not many meteorites are seen hitting the ground and most fall into the sea, thousands are found each year. Meteorites can be found all over the world, but are easiest to spot in dry places, such as deserts , where they do not erode quickly and are less likely to be obscured by vegetation.

Scientists known as cosmochemists are able to work out what has happened throughout the life of a meteorite by studying its chemical structure, revealing a little piece of the solar system's history one rocky chunk at a time.

2007-01-21 19:11:11 · answer #3 · answered by ROOR 3 · 0 1

A METEOROID is a small hunk of rock or metal drifting in space

A METEOR is the streak of bright light seen when a meteoroid enters Earth's atmosphere

A METEORITE is a meteor that's reached the ground

2007-01-21 19:11:58 · answer #4 · answered by Chug-a-Lug 7 · 0 2

It is called a tail hun.

A comet's tail is its most distinctive feature. As it approaches the Sun it develops an enormous tail of luminous material that extends for millions of kilometers away from the Sun. When far from the Sun, a comet's nucleus is very cold and its material is frozen. Water ice, as well as other compounds such as carbon dioxide and carbon monoxide ice, may be found in the nucleus. This icy nucleus changes radically when a comet approaches the Sun. The intense solar wind from the Sun transforms the solid nucleus directly into a vapor, bypassing the liquid phase. This process is called sublimation. The vapor helps stir things up in the nucleus, forcing the core to form a cloud-like mixture of gas and dust around it, called the coma. There, sunlight and the solar wind interact with the ingredients, creating the tails. The ingredients in the coma determine the types and number of tails. Some comets may appear to have no tails, but they really do. They are simply very faint. Scientists can identify these tails by using special filters that are sensitive to dust or gas emissions. Other comets, like Hale-Bopp, which could be seen from Earth in 1997, have very prominent tails. Although Hale-Bopp's tails could be seen visibly from Earth, scientists using sensitive cameras identified a much more complicated tail structure. One of these images revealed a long, curving dust tail. Other pictures showed dust and gas ion tails. There was even an image of a dust tail and two gas ion tails. The different tails provide scientists with important information about the internal chemistry and structure of a comet's nucleus.
4. What are the types of comet tails?

There are two types of comet tails: dust and gas ion. A dust tail, which is usually yellow, contains small, solid particles that are about the same size as those found in cigarette smoke. This tail forms because sunlight acts on these small particles, gently pushing them away from the comet's nucleus. . Because the pressure from sunlight is relatively weak, the dust particles end up forming a diffuse, curved tail. A gas ion tail, which is usually blue, forms when ultraviolet sunlight rips one or more electrons from gas atoms in the coma making them into ions (a process called ionization). A solar wind then carries these ions straight outward away from the Sun. The resulting tail is straighter and narrower. Both types of tails may extend millions of kilometers into space. As a comet heads away from the Sun, its tail dissipates, its coma disappears, and the matter contained in its nucleus freezes into a rock-like material. Recent observations of the very bright comet Hale-Bopp pinpointed a tail made of sodium (Na), a relative of the gas ion tail. This tail forms when sunlight pushes on sodium atoms released from the nucleus.

2007-01-21 19:23:31 · answer #5 · answered by danielle Z 7 · 0 1

Burnt off gases from the extreme heat entering our atmosphere..

But I prefer a snarky answer like... "Use Preparation M" LOL

2007-01-21 19:09:30 · answer #6 · answered by waynebudd 6 · 1 1

I think theyr'e called meteorites and I think your'e referring to their tail.

2007-01-21 19:08:54 · answer #7 · answered by Anonymous · 0 0

I think you are talking about comets, but it is called the tail.

2007-01-21 19:26:26 · answer #8 · answered by Anonymous · 0 1

the meteoroid

2007-01-21 19:14:46 · answer #9 · answered by Marko K 2 · 0 3

gas vapor trails

2007-01-21 19:22:26 · answer #10 · answered by blinkky winkky 5 · 0 2

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