UNIVERSE
ASTEROIDS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
toward the sun
|
|
|
toward the Earth
|
|
|
away from the Sun
|
|
|
away from the Earth
|
Detailed explanation-1: -When far from the sun, a comet is like a stone rolling around the universe. But when it approaches the sun, the heat evaporates the comet’s gases, causing it to emit dust and microparticles (electrons and ions). These materials form a tail whose flow is affected by the sun’s radiation pressure.
Detailed explanation-2: -When a comet’s orbit brings it close to the Sun, it heats up and spews dust and gases into a giant glowing head larger than most planets. The dust and gases form a tail that stretches away from the Sun for millions of miles.
Detailed explanation-3: -This tail points away from the Sun, but because the dust particles are driven out of the coma more slowly than the ions making up the gas tail, they retain more of their original forward motion and the dust tail tends to be more curved than the gas tail.