Comets

First flight: 29 July 1949. Entered service: 2 May 1952. Go here: http://en.wikipedia.org/wiki/De_Havilland_Comet

Comet nuclei are composed of a mixture of rock, dust, ice, and frozen gases such as water, carbon dioxide, methane, and ammonia. These materials are thought to be remnants from the early days of the solar system, providing important clues about its formation and evolution.

From: http://www.windows.ucar.edu/tour/link=/comets/tail.html&edu=high :

One tail is due to the comet's dust particles, the other is due to ionized gas from the comet coma.

Dust particles form the first tail. The only force which affects these small particles in space is corpuscular radiation from the Sun itself. This radiation pushes the tiny dust particles in the direction from which they came, the way wind can blow rain droplets at an angle. Cometary dust particles can be thought of as billowing up from the comet's surface. Thus, this comet tail generally points back along the comet trajectory.

Ions (electrically charged particles), which first come from the nucleus as (neutral) gaseous particles, are swept into the second comet tail by interaction with the Interplanetary Magnetic Field (IMF). The IMF, or magnetic field of the sun, which is present everywhere in interplanetary space, sweeps past the comet nucleus and carries the ions with it to form the tail. Because of this special interaction with the IMF, this tail always points directly away from the Sun"

The center of a comet is called the nucleus. It is made up of ice, rock, dust, and organic compounds frozen together.

The Oort cloud is thought to have formed from leftover material from the early solar system. Gravitational interactions with nearby stars and the giant planets may have scattered these icy bodies to the distant reaches of the solar system, forming the spherical Oort cloud.

Comets typically appear as bright, icy bodies with a glowing coma (dust and gas) surrounding a nucleus. They can be seen as a fuzzy or blurry object in the night sky with a long tail that points away from the Sun. The tail forms as ice and dust vaporize and get blown by the solar wind.

If a comet were to hit Earth, it could cause widespread destruction and have catastrophic effects. It is important to follow emergency response procedures, seek shelter in a secure location, and follow evacuation orders if necessary. It's also crucial to stay informed through official channels for updates and instructions.

Comets are composed of ice, dust, rock, and organic compounds. The ice includes water, carbon dioxide, and ammonia, while the dust and rock are made up of silicate minerals and metals like iron and nickel. Organic compounds found in comets include complex carbon-based molecules like amino acids and hydrocarbons.

Halley's comet was named after a British astronomer. Edmund Halley concluded that reports of three different comets which appeared 76 years apart from one another were referring to the same comet. He died before the year of his prediction, but it appeared. Therefore, the comet was named after him.

The heart, or center of a comet is called the nucleus. The nucleus is made of a solid piece of ice surrounded by a cloud of particles and gases.

A comet is predominantly cold in nature. The surface temperature of a comet is typically below freezing, as it is composed of ice, dust, and rock. However, as a comet nears the Sun, heat causes the ice to sublimate and release gas and dust particles, creating the visible coma and tail.

Halley's Comet was first recorded in 240 BC by Chinese astronomers. However, it was Sir Edmund Halley who calculated its periodicity in 1705, predicting its return in 1758. The comet was then named after him.

A comet typically consists of a nucleus, coma, dust tail, and ion tail. The nucleus is the solid core made of ice, dust, and rock, while the coma is the gas and dust cloud surrounding the nucleus. The dust tail is made up of small dust particles reflecting sunlight, and the ion tail consists of ions and electrons blown away by the solar wind.

The extrinsic catastrophist theory of comets suggests that comets originate from outside the solar system and are responsible for catastrophic events on Earth, such as mass extinctions. This theory proposes that comets carry organic materials that may have influenced the development of life on Earth.

No. At the extremity of a comet's orbit (farthest point from the sun) it is moving very slowly (for an interstellar object). But it cannot quite escape the sun's gravity, so it begins to fall back in toward the sun. It is accelerating constantly from that point on until it swings around the sun, when it is moving at it's fastest. Then, as it heads back out into space on it's orbit, it is slowly and steadily slowing down, and the whole cycle repeats.

Edmond Halley. He stated his belief that the comet sightings of 1456, 1531, 1607, and 1682 related to the same comet, which he predicted would return in 1758. When it did it became generally known as Halley's Comet.

Comets are typically visible from Earth every few years, with some being more frequently observed than others. Most comets are only visible for a short period of time as they move through the inner solar system. Astronomers actively monitor for new comets using telescopes and observatories.

Craters happen when meteorites impact on the Moon's surface.

Most of the craters on the Moon are billions of years old, the impacts were much more common during the early stages of the solar system's formation.

There are craters on the Earth's surface as well. They are just harder to see, because the surface of the Earth changes faster because we have an atmosphere and erosion.

That depends. What are you asking, the parts of a comet or the composition of a comet? For the parts, there is the nucleus, which is the very center of the comet and what it is actually made of, then the coma surrounds the nucleus, then the tail trails behind it. A comet's nucleus is made up of dirty ice and rock. The tail is often made of gas or dust. Sometimes the comet has two tails, one of dust and one of gas. Hope this helps! :)

The word "comet" comes from the Latin word "cometa," which in turn is derived from the Greek word "kometes," meaning "long-haired star." This likely refers to the bright, flowing tail that comets often exhibit as they approach the Sun.

all comets have two tail one is an ion tail made of gas the other is a dust tail made of dust. which means Halley's comet has two tails. :)

that's true what the person up there said.. but im doing a project on comets and i searched on Google images for its composition[whats it made of] and it said the was an Ion Tail, a Dust Tail, and a Hydrogen Envelope. the ion tail and the dust tail are right but i have no idea about the hydrogen envelope. confusedd ..

Well the first dude is right because i researed it and it said that so ya

You can find pictures of Halley's Comet by searching on reputable astronomy websites, such as NASA's official site or the European Space Agency's website. Additionally, many online image databases and astronomy magazines may also have high-quality images of Halley's Comet.

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