6.According to paragraph 3, the tails of a comet A.flow in the same direction as the radiation that produces them B.become straighter as the comet moves away from the Sun C.are pulled toward the Sun D.can become detached from the comet head if the solar winds are strong enough ...
When a comet is warmed as it approaches perihelion the rise in temperature leads to evaporation, so that the comet develops a head or coma, often with a tail or tails. Cometary tails always point away from the Sun, and are of two main types ion and dust tails. A gas or ion tail ...
Since a comet loses matter on each pass by the Sun, eventually it will be depleted to the point where it is no longer visible.Comets that approach the Sun have finite lifetimes.Given the typical sizes of comets and the typical rates at which they lose matter, astronomers have concluded that...
Ion Tail: A straight tail of ionized gases. Antitail: A rare tail pointing toward the Sun, seen due to perspective effects. Sun Radiatin: Direction of the solar wind.
Why are there no comets in orbit close to the sun? It isunusual for it to lose enough energy to be swallowed by the Sun. When the point of a comet's orbit is closest to the Sun, known as its perihelion, the comet has enough velocity to move around the Sun faster than the Sun's...
Some comets do not have tails, looking like hazy, round spots of light. A comet is a small body in the solar system that orbits the Sun and (at least occasionally) exhibits a coma (or atmosphere) and/or a tail - both primarily from the effects of solar radiation upon the comet's nu...
comet's gravity [although the comet's rotation would throw it off into space]. Astronomers also point out that an asteroid's size and mass have a direct bearing on another vital statistic of these bodies—their shape. Like Earth and the other planets, as well as their larger moons,...
(the horizon) is the point directly overhead (the zenith). If the head of Comet Tebbutt had been at the horizon, its tail would have arced across the sky well past the zenith. Just as it would in 1910, the Earth survived its close encounter with the tail of the Great Comet of 1861...
the Sun (like the gas tail) and the largest will be left in the comet's orbit. When a comet is close to the Sun, the angle of this fan can be 90 degrees or larger. If the Earth-comet-Sun geometry is correct, the dust in the comet's orbit will appear to point toward the Sun...
Since a comet loses matter on each pass by the Sun, eventually it will be depleted to the point where it is no longer visible. Comets that approach the Sun have finite lifetimes. Given the typical sizes of comets and the typical rates at which they lose matter, astronomers have concluded ...