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प्रश्न
Why do some stars appear blue and some red?
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
Name the different types of stars.
A star rises at 8 pm tonight. At what time will it rise after a month? Why?
State whether the following is 'True' or 'False'.
The planets keep changing their position with respect to stars.
In the given figure, out of the positions A, B, C and D which will indicate the position of the sun? Draw the sun at the appropriate position.
Stars mainly consist of ______.
Name the star that appears to be stationary in the night sky.
Name the planets which have more than 60 Moons.
Stars appear to twinkle. Give reason.
Do stars emit light only during the night?
We can see nearly ______ stars with the naked eye in the dark night.
