Advertisements
Advertisements
प्रश्न
Why do some stars appear blue and some red?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Fill in the blanks:
Shooting stars are actually not _________.
Do all the stars in the sky move? Explain.
Sun appears to move from east to west around the earth. This means that earth rotates from
State whether the following statement is ‘True’ or ‘False’.
The planet Venus appears in the eastern sky before sunrise.
Name the star that appears to be stationary in the night sky.
What is the distance that light travels in one year called?
Stars appear to twinkle. Give reason.
What is a star? What is its composition and how was it formed?
The brightness of stars depends on their ______ and ______ from the earth.
The temperature of the star is determined by ______.
