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प्रश्न
Why do some stars appear blue and some red?
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उत्तर
Stars are the fundamental building blocks of galaxies. Stars were formed when the galaxies were formed during the Big Bang. Stars produce heat, light, ultraviolet rays, x-rays, and other forms of radiation. They are largely composed of gas and plasma (a superheated state of matter).
The brightness of a star depends on their intensity and the distance from the Earth. Stars also appear to be in different colours depending on their temperature. Hot stars are white or blue, whereas cooler stars are orange or red in colour.
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संबंधित प्रश्न
Why is the distance between stars expressed in light years? What do you understand by the statement that a star is eight light years away from the Earth?
Morning star is the name given to
Which of the following figures depicts the position of pole star correctly?
State whether the following statement is ‘True’ or ‘False’.
All the stars are at the same distance from us.
State whether the following statement is ‘True’ or ‘False’.
The planets keep changing their position with respect to stars.
In the picture of rotating earth given as figure mark the position of pole star.
Name the planets which have more than 60 Moons.
What is a star? What is its composition and how was it formed?
The temperature of the star is determined by ______.
Stars also appear to be in different colors depending on their composition of Gases.
