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Comet - Wikipedia
https://en.wikipedia.org/wiki/Comet
WebQ3559. A comet is an icy, small Solar System body that warms and begins to release gases when passing close to the Sun, a process called outgassing. This produces an extended, gravitationally unbound atmosphere or coma surrounding the nucleus, and sometimes a tail of gas and dust gas blown out from the coma.
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Here's how to see 'horned' comet 12P/Pons-Brooks at its …
https://www.space.com/comet-12p-pons-brooks-march-2024
Web6 days ago · From Feb. 25 to April 5, comet 12P/Pons-Brooks will take a track from north of the Great Square of Pegasus to Aries the Ram. One of the best times to spot the comet with your naked-eye will be...
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Comets - NASA Science
https://science.nasa.gov/solar-system/comets
WebComets are cosmic snowballs of frozen gases, rock, and dust that orbit the Sun. When frozen, they are the size of a small town. When a comet's orbit brings it close to the Sun, it heats up and spews dust and gases into a giant glowing head larger than most planets. The dust and gases form a tail that stretches away from the Sun for millions of ...
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What Is a Comet? | NASA Space Place – NASA Science for Kids
https://spaceplace.nasa.gov/comets/en/
Web6 days ago · Comets, such as the comet ISON pictured here, are thought to hold material from the time when the Sun and planets were forming. They are like giant, frozen time capsules in our solar system. Credit: NASA/MSFC/Aaron Kingery.
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Comet | Definition, Composition, & Facts | Britannica
https://www.britannica.com/science/comet-astronomy
WebMar 22, 2024 · Comet, a small body orbiting the Sun with a substantial fraction of its composition made up of volatile ices. Comets are among the most-spectacular objects in the sky, with their bright glowing comae and their long tails. Comets can appear at random from any direction as they move in eccentric orbits around the Sun.
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Comets: Everything you need to know | Space
https://www.space.com/comets.html
WebJul 31, 2023 · Comets are defined as icy bodies of frozen gases, rocks and dust left over from the formation of the solar system about 4.6 billion years ago. They orbit the sun in highly elliptical orbits that...
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Green comet will appear in the night sky for the first time since the
https://www.cnn.com/2023/01/31/world/green-comet-c-2022-e3-watch-scn/index.html
WebJan 31, 2023 · 01:42 - Source: CNN Business. A recently discovered comet will soon swing by Earth for the first time in 50,000 years. The green comet will make its closest approach between February 1 and 2.
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Comets explained: An essential guide to the snow cones of space
https://www.astronomy.com/science/comets-an-essential-guide-to-the-snow-cones-of-space/
WebOct 16, 2023 · Comets from the Oort cloud take over 200 years to complete their orbits, a metric called the orbital period. Because of their long periods, they’re called long-period comets. Astronomers often ...
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Comets: Facts - NASA Science
https://science.nasa.gov/solar-system/comets/facts/
WebComets actually have two tails―a dust tail and an ion (gas) tail. Most comets travel a safe distance from the Sun―comet Halley comes no closer than 89 million kilometers (55 million miles). However, some comets, called sungrazers, crash straight into the Sun or get so close that they break up and evaporate.
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What are comets and where do they come from? - Astronomy …
https://www.astronomy.com/science/what-are-comets-and-where-do-they-come-from/
WebJan 6, 2023 · The dynamical class of a comet refers to the reservoir from which it was perturbed into the inner solar system. The two major groups are the short-period comets (SPCs), with orbital periods up to ...
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