Comets

Earth is a large, solid planet with a well-defined orbit around the sun, while a comet is a much smaller, icy body that orbits the sun in an elongated, elliptical path. Comets can develop spectacular tails as they approach the sun due to the heat causing the icy material to vaporize, whereas Earth does not exhibit such phenomena.

Comet Halley is a famous periodic comet that orbits the Sun about every 76 years. It was last seen in 1986 and will next be visible from Earth in 2061. Its discovery and observation contribute to our understanding of comets and their trajectories.

First, the danger must be detected way ahead of time. Second, something would have to be done to change their orbits. For example, making atom bombs explode on or near their surface has been considered. If detected way in advance, a small change in its direction could take it away from Earth. This is all hypothetical - so far, no Near Earth Object has been thus stopped.

Comets reflect light from the sun. This is the same way you see the moon glowing. When a comet's orbit nears the Sun it starts to warm up since they are usually black in colour. Water vapour sublimes from the surface of this 'dirty snowball' and forms a cloud of ice crystals known as the 'Coma'. It is this white cloud that reflects sunlight and makes it visible to us.

While this question theoretically has an answer, we don't know what it is, and no one is particularly interested in finding out. There are lots of very long period comets with multi-thousand or even million year orbits.

Anywhere from "millions of years or more" to "just until the next time they approach the Sun" (or hit something, like Comet Shoemaker Levy 9 did Jupiter in 1994). Some comets making their first approach to the Sun (presumably after a gravitational encounter in the outer solar system) come too close and are destroyed. Most familiar comets like Halley's Comet can be expected to "live" millions of years into the future as they have relatively stable orbits and do not come too close to the Sun.

Comet speeds increase as they near the sun due to the sun's gravitational pull. The sun's gravity accelerates the comet as it moves closer, causing an increase in speed. Additionally, as the comet nears the sun, it is subjected to increasing solar radiation and solar wind pressure, which can also contribute to its acceleration.

Europa's atmosphere is very thin and composed primarily of oxygen, with trace amounts of other gases like carbon dioxide and molecular hydrogen. The moon's thin atmosphere is created by radiation splitting water molecules on the surface into these constituent gases.

Comets are made up of dust, rock, ice, and frozen gases. The most common compounds found in comets include water ice (H2O), carbon dioxide (CO2), ammonia (NH3), methane (CH4), and carbon monoxide (CO). Additionally, comets can contain organic molecules such as formaldehyde and methanol.

Most comets, like the rest of the solar system, are about 4.5 billion years old.

1. Nucleus: The solid core of a comet composed of ice, rock, and dust.
2. Coma: The gas and dust envelope that surrounds the nucleus when the comet approaches the sun.
3. Tail: The long stream of gas and dust particles that is pushed away from the coma by solar radiation pressure, always pointing away from the sun.

Edmond Halley saw a fuzzy star with a tail in 1682 and correctly predicted that it would reappear in 1758. This periodic comet was later named Halley's Comet in his honor.

The word for every 75 years is "septuagesimal."

As objects visible to astronomers with telescopes, it is a rare time when some comet is not visible in the sky, at some place in the world. But as far as large, naked-eye comets, the last one was Comet Hale-Bopp, which reached maximum brightness in April of 1997. It will not return for about 2500 years. New comets are being discovered all the time, but there is no way to predict when or if a large, naked-eye comet will be seen again. We are reasonably sure of the return of Comet Halley, but that will next be in 2061.

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.

Asteroids, meteoroids, and comets orbit the Sun due to the gravitational pull between these celestial bodies and the Sun. Their orbits are influenced by their initial velocity, mass, and distance from the Sun. When they come close to Earth, they can be observed as shooting stars or meteor showers.

He didn't discover it.

He did some calculations that suggested that a certain comet, seen during his lifetime, and three comets seen many years before, had the same orbit, and therefore were all probably the same comet.

He also predicted that this comet would return in a certain year in the future.

It did and it was named as Halley's comet, in his honour.

No. While some people may have a body that is more resilient to Comet, the body still considers it a toxin. If enough of it gets in your system (it sometimes takes a while for your body to get rid of toxins), it can over come your immune system and make you sick

It all depends on what you are looking for exactly, some of them such as nationwide and most insurance are up. So you can maybe go bother them for a second.

Yes, Comet Electrical offers warranties on their products. The length and coverage of the warranty can vary depending on the specific product, so it's best to check with them or refer to the product documentation for detailed information.

A comet is made of ice, rock, and dust, and as it approaches the sun, the heat causes the ice to vaporize, releasing gas and dust that forms a glowing tail. This tail is what gives comets their spectacular appearance as they travel through space.

When comet Tempel 1 collides with a NASA space probe in the early morning hours of July 4, 2005, scientists at the Jet Propulsion Laboratory expect some holiday sizzle - a brilliant flash and a dramatic spray of debris.

This cosmic collision will create a crater exposing Tempel 1's interior. Like all comets, Tempel 1 consists of the frozen remains of material that formed the solar system. But what, precisely, is this stuff? How is it put together? Peter Schultz, crater expert, will help find out.

Schultz is a professor of geological sciences at Brown University and a leading expert in impact cratering, the science of what happens when a massive, fast-moving cosmic train slams into something. His work helps explain when and how comets, asteroids and other space travelers shaped the face of planets such as Earth and Mars, as well as the Moon and other satellites.

Schultz's expertise landed him a spot in the inner scientific circle for "Deep Impact," the joint space mission coordinated by the Jet Propulsion Lab and the University of Maryland. Schultz is one of 13 co-investigators overseeing the mission, which will provide a first-ever look inside a comet when scientists release an impactor into Tempel 1's path for a planned collision.

"This is heady stuff," Schultz said. "The ice inside comets has been in the deep freeze since the creation of the solar system. Now we are finally going to see what this stuff looks like and what it is made of. This is important information. Comets may have been the messengers that carried the ingredients of life to Earth

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Halley's Comet is a natural phenomenon, a periodic comet that orbits the Sun and is visible from Earth every 75-76 years. It is not a theory or a law — it is a well-established astronomical event that has been observed and documented for centuries.