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2. Comet Hale–Bopp - Wikipedia

   en.wikipedia.org/wiki/Comet_Hale–Bopp

   Hale–Bopp was the first comet where the noble gas argon was detected. [46] Noble gases are chemically inert and vary from low to high volatility. Since different noble elements have different sublimation temperatures, and don't interact with other elements, they can be used for probing the temperature histories of the cometary ices.

3. Sublimation (phase transition) - Wikipedia

   en.wikipedia.org/wiki/Sublimation_(phase_transition)

   The sublimation that occurs at the solid-gas boundary (critical sublimation point) (corresponding to boiling in vaporization) may be called rapid sublimation, and the substance sublimes rapidly. The words "gradual" and "rapid" have acquired special meanings in this context and no longer describe the rate of sublimation. [citation needed]

4. Comet - Wikipedia

   en.wikipedia.org/wiki/Comet

   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.

5. Comet tail - Wikipedia

   en.wikipedia.org/wiki/Comet_tail

   Comet Holmes (17P/Holmes) in 2007, showing blue ionized gas tail on right Animation of a comet's tail. A comet tail and coma are visible features of a comet when they are illuminated by the Sun and may become visible from Earth when a comet passes through the inner Solar System.

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7. Play Just Words Online for Free - AOL.com

   www.aol.com/games/play/masque-publishing/just-words

   Just Words. If you love Scrabble, you'll love the wonderful word game fun of Just Words. Play Just Words free online! By Masque Publishing