The three main parts of a comet are the nucleus, coma, and tail. The nucleus is the head of the comet, the coma is the middle, and the tail is the end of the comet.

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Some races have an average height which is shorter than others. But there are always exceptions. The tallest man currently registered with Gunniess World Records is Chinese. However he has allegedly been overtaken by a Ukrainian who is still growing.

Any size is possible, though most of them are "small", at least compared to things like planets. Halley's Comet, for example, is about 15x8x8 km, which is quite large on a human scale ... most mountains aren't that big ... but still small compared to Earth itself or even the Moon.

• Asteroids and meteors are made up of rocks or ice.
• All cannot be seen without a telescope (Only comet has exception to that whenever it's orbit comes close to Earth such as Hailey's comet.

what would happen if a comet collided with our planet?

I can visualize it harming the atmosphere before it makes its crash,

perhaps that was the cause of extinction of life years ago,such thing may cause eruption of volcano that sends intense level of atoms in the ozone layer and stop the penetration of sun rays,as a consequence, temperature drop down ,rains will be more repeated that the level of the sea would rise,an other effect of such collision is earthquake that could eradicate ail forms of existence all these are enough reasons for scientists to search more and more how to escape such a tragedy

The superstitious belief about comets are that they bring bad luck. Others superstitious beliefs are that comets are attacks that are brought on by the heavens.

"Down" is the direction of the greatest mass, which, in the Solar System, is the Sun. The reason ALL comets haven't fallen into the Sun is that there also have angular momentum, which results in them falling AROUND the Sun.

The shrink-ability results from polymer chains under stress which upon heating, this stress is released and polymer chains have more freedom to move around and stabilized under more relaxed state upon cooling.

Moreover, The shrink-ability of BOPP film is determined mainly by the orientation process.

Thus, by decreasing the stretching in the machine direction (MD), the shrink-ability in MD will be reduced.

Same for TD.

There is no such thing as asteroid showers, perhaps you mean meteor showers.

Halley's Comet never comes to Earth. The comet - as with all astronomical bodies - follows its own orbit, falling endlessly through the solar system.

Halley's Comet is currently a little further from the Sun than the orbit of Neptune, moving very slowly outward from the Sun. It will linger there, reaching the peak of its orbit in about 15 years, before beginning its long slow fall back into the inner solar system.

Comets have wide orbital paths, they are great balls of ice and dust that can take hundreds of years to complete one orbit.

the answer is idk

Yes, it does have brighter and longer tail, because during its closest approach to the sun, it was most effected by the sun (evaporating the more water from the comet).

When it was further out, when the sun is much further, it will gradually become cooler, no ice evaporating too space, and no tail.

The Coma is the fuzzy outer layer of a comet.

Comets are made of ice, rock, cosmic dust, ammonia, carbon dioxide, methane ice and water. Density will vary depending on it's exact composition. Being that its primary component is water ice, it's specific density will be very close to 1. That is a comet is likely just less dense than water. A large comet if landed softly in the ocean would probably float.

We generally believe that comets with orbits of 200 years or less, traveling in the ecliptic plane, come from the Kuiper Belt. Those comets with longer orbits, or that travel at angles to the ecliptic plane, come from the Oort Cloud.

Billions.

Ice & dust.

Comets are lumps of rock or ice broken away from larger comets or asteroids. These do not only orbit the sun but other planetary systems around our universe.

They orbit our sun due to the tremendous gravitational force the sun has. It pulls everything around it with less gravity than its self towards it. A well known comet is Haley's comet, which has been orbiting the sun for millions of years. It is locked in a orbit like we are around the sun, and this one particular comet is next estimated to pass Earth again in 2065.

Smaller comets hit earth's atmosphere every day and are seen as shooting stars at night because they are simply too small to penetrate the dense gasses surrounding our planet. These are the size of grains of sand and up-to small cars.

150,000 tonnes of space material of rock and ice enter Earth as a result of gravity from the earth pulling space debris towards us.

While asteroids and comets have different constitutions - asteroids are mostly metals and rocks while comets consist of water-ice, dust and rock - with comets potentially being potentially less dense, comets travel much faster than asteroids. An asteroid may travel upwards of 40,000 miles per hour, a comet travels over 150,000 miles per hour.

Halley's comet's mass (weight) is exactly 2.2×1014 (TO the power of 14)

Comets are just very icy asteroids, they become comets when a large enough of a body of mass, i.e. jupiter or saturn. When this happens, the asteroid gets thrown into an extremely high elliptical orbit. They ideally have an orbit perpindicular to the ecliptic.

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