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Why are there no videos of comets?

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A comet is an icy small Solar System bodythat, 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. read more

Comet tails may spray planets, as was the case in 2013 with Comet Siding Spring and Mars. At first glance, comets and asteroids may appear very similar. The difference lies in the presence of the coma and tail. Sometimes, a comet may be misidentified as an asteroid before follow-up observations reveal the presence of either or both of these features. read more

“There is no scientific basis — not one shred of evidence — that an asteroid or any other celestial object will impact Earth on those dates,” said Paul Chodas, manager of NASA’s Near-Earth Object office at the Jet Propulsion Laboratory in Pasadena, California, in the statement. read more

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Why are there no comets in an orbit close to the Sun?
Source: answers.com

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The Threat of Asteroids and Comets
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