This entry was posted on April 5, 2018Last modified on July 26, 2019.
The two tails of the comets
The most impressive tail of a comet is caused by sunlight which is reflected and scattered by the dust trail of the comet - also called dust trail.
In addition, there is often a gas tail, depending on the amount of gas emitted by the comet. This gas is ionized (excited to glow) by the energy of the solar wind. This ion tail shines preferably with the emission lines of OIII (501nm) and Cyan (511 and 514nm).
If you want a better contrast for the comet in the sky, you must consider the following with the choice of suitable filters:
There is no way to show only only the dominant light fractions of the dust tail (as with...