Tourist places in usa for A tail's curvature and length are typically greatest just after the comet's closest encounter with the Sun, when it is traveling fastest and is at its most productive. In the case of a comet steeply inclined to the plane of Earth's orbit around the Sun the ecliptic; see ig and ig, this curvature may be very apparent to Earth-dwellers, and the dust tail may seem wider and be easily distinguishable from the gas tail. However, where a comet's orbit is angled narrowly to the ecliptic plane, the dust tail will generally appear to Earth-dwellers to be narrower, straighter, brighter, and longer, and will combine with the gas tail to form a single tail. Some comet tails are mindbogglingly large.
Especially long and wide tails are associated with very productive comets that begin reacting to the Sun when far from it.
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Some hyperactive small nuclei like that of Hyakutake produce extraordinarily long tails. But the dream scenario for a long comet tail is a large, very volatile nucleus.
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