UNIVERSE
ASTEROIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Trails behind the comet, pointing away from the Sun as the comet approaches it, and toward the Sun as the comet moves out of the inner Solar System.
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gas and dust expelled from the comet’s nucleus and blown outward by radiation pressure and the solar wind
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gas and dust pulled off the comet by the Sun’s gravity
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always points away from the Sun
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Detailed explanation-1: -properties of comets The dust tail forms from those dust particles and is blown back by solar radiation pressure to form a long curving tail that is typically white or yellow in colour.
Detailed explanation-2: -The tail of dust is left behind in the comet’s orbit in such a manner that it often forms a curved tail called the antitail, only when it seems that it is directed towards the Sun.
Detailed explanation-3: -Comets typically show 2 main tails. The gas tail consists of charged particles swept along by magnetic fields embedded in the solar wind. The dust tail is composed, not surprisingly, of dust particles, released from the nucleus by escaping gases and pushed out into a curved tail by radiation pressure.
Detailed explanation-4: -When comets come near the Sun, their tails become visible because heat from the Sun vaporizes some of the icy nucleus or head and sunlight reflects from the vapor. Solar wind pushes the vapor in a direction away from the Sun to form the comet’s tail.
Detailed explanation-5: -Gas and dust in the comet’s nucleus and coma often separate into two parts of the comet’s tail. A comet’s dust tail is the trail of dust and gas illuminated by the Sun. It is blown away from the comet’s coma by the solar wind, and follows the curve of the comet’s orbit.