Comet

Introduction
Speeding Icy celestial objects that pass by the Sun, heat up and release gas or as we like to come them, Comets. Comets are an astronomical phenomenon that captures our imagination and puts us at awe. The release of gas from comets is a process known as outgassing. Comets have coma, which are the nebulous envelopes of a Comet, that when it starts to heat up produces a tail which forms a comet.
Where they come from
Comets can come from multiple sources. One source is The Kuiper Belt. These comets are called Short-period Comets. Comets that originate from The Oort Cloud are titled Long-period Comets. Any Comets that are from outside The Solar System are called Exocomets, just like Planets outside The Solar System are known as exoplanets. 
Where they go
Three things can happen to comets. Departure (ejection) from The Solar System, Volatiles exhausted & Breakups and Collisions. Departure or ejection from The Solar System is when either The Comets just leaves The Solar System in its cycle or is thrown out due to strong gravity.Volatiles exhausted Comets are those who fade away overtime. Breakups and Collisions are what they say they are, Breakups are when the comets breaks apart and no longer is a comet and a collision is when the comet collides which another form of solid matter, halting its path indefinitely.