Eclipses happen on schedule; they are very predictable. (NASA has a 5,000 year map of all eclipses from 2000 BC to 3000AD.)
Comets? Not so much. Even comets whose orbits are pretty-well known sometimes appear months early or late, and some expected comets never re-appear, having disintegrated into dust during their previous pass by the Sun.
And new comets are discovered every month. Hundreds of amateur comet hunters watch the skies nightly from their backyard observatories, hoping to be the first to discover a new comet. Many succeed.
We won't know about a new comet - until it is discovered.
2062
in 2016 .
Halley's Comet is next due to pass by Earth in 2061. It follows a roughly 76-year orbit around the Sun.
The next comet will be Comet Ison which will pass by the earth in 2013. It will be visible with lenses during late summer and will be visible to the naked eye by approximately November.
Some time in 2061 i think
The next notable comet scheduled to pass by Earth is Comet Leonard, which is expected to be visible in December 2021. It will be the brightest comet of the year and should be observable with binoculars or a small telescope from dark sky locations. Keep an eye out for updates from astronomers as the date approaches for the best viewing opportunities.
The name of the comet that will pass Earth on August 15, 2011, is the comet Honda.
We don't have a clue. That's why we do research; to learn things that we didn't know. We usually don't know what the result will be before we look. And predicting comet appearances is tough! We _expect_ that people will have a much better view of Halley's Comet next time, because the last pass was on the other side of the solar system from Earth; next time it ought to be closer. Ask this question in 2061.
Air Comet ended in 2009.
Comet Crash - 2009 VG was released on: USA: 2 April 2009
It's unclear what you mean by "hades comet." If you are referring to a comet named Hades, there is no specific comet with that name. If you meant Halley's Comet, it will next be visible from Earth in 2061.
The next visible comet that is expected to be visible to the naked eye is Comet Leonard in late 2021.