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  1. Comet - Wikipedia

    A comet is an icy, small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process called outgassing. This produces a visible atmosphere or coma, and sometimes also a tail. These phenomena are due to the effects of solar radiation and the solar wind acting upon the nucleus of the comet.

  2. comet | Definition, Composition, & Facts | Britannica

    Comet, a small body orbiting the Sun with a substantial fraction of its composition made up of volatile ices. When a comet comes close to the Sun, the ices sublimate (go directly from the solid to the gas phase) and form, along with entrained dust particles, a bright outflowing atmosphere around the comet nucleus known as a coma.

  3. A comet is a ball of mostly ice that moves around in outer space. Comets are often described as "dirty snowballs". They are very different from asteroids. The orbital inclinations of comets are usually high and not near the ecliptic where most solar system objects are found.

  4. Comet Watch 2021 - Sky & Telescope - Sky & Telescope

    Jan 20, 2021 · This periodic comet, made famous by the European Space Agency's Rosetta Mission, returns to the inner solar system after a 6.4-year hiatus. This year's apparition is similar to the one it had in 1982, when the comet reached 9th magnitude and grew a pretty tail.

  5. Comet (Hersheypark) - Wikipedia

    Comet is a wooden roller coaster at Hersheypark in Hershey, Pennsylvania. It is located in the Hollow section of Hersheypark, next to Skyrush. Built in 1946 by the Philadelphia Toboggan Coasters (PTC) of Philadelphia, Pennsylvania, the coaster features a double out and back track layout. When built it was jointly owned by Hershey Park and PTC.

    • 78 ft (24 m)
    • 42 in (107 cm)
    • 84 ft (26 m)
    • 50 mph (80 km/h)
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  7. Newly found Comet Leonard might become 2021's brightest ...

    Jan 13, 2021 · Astronomer Greg Leonard discovered the comet that now bears his name – C/2021 A1 (Leonard) – on January 3, 2021 at the Mount Lemmon Observatory in Arizona. Astronomers report that discovery images...

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  8. Is This The Naked-Eye Comet We’ve Been Waiting For? ‘Comet ...

    Mar 19, 2020 · Comet Atlas is a near-parabolic comet, which means it has an eccentric elliptical orbit of the Sun, so visits the inner solar system less than once ever 1,000 years. In fact, this comet only visits...

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