alleryWhy does a comet develop a long tail near the Sun?
AIts ice sublimates and ionises
BIts rock melts into lava
CIts orbit becomes circular
DIt collides with a planet
Answer & Solution
Correct answer: A. Its ice sublimates and ionises
1. Comets are made largely of volatile ices.
2. Near the Sun the icy surface sublimates and ionises, forming a coma and tail.
3. Rock does not melt at such distances and the orbit stays highly eccentric.
_Source: Wikipedia, Solar System, Comets_
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