Advertisements
Advertisements
Question
Why do some stars appear blue and some red?
Advertisements
Solution
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
RELATED QUESTIONS
Mark the following statement as true (T) or false (F).
Pole star is a member of the solar system. ( )
Explain how you can locate the Pole Star with the help of Ursa Major.
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?
State whether the following statement is ‘True’ or ‘False’.
The planets keep changing their position with respect to stars.
State whether the following statement is ‘True’ or ‘False’.
The planet Venus appears in the eastern sky before sunrise.
In the picture of rotating earth given as figure mark the position of pole star.
Write the names of all planets in the figure.
Name the star that appears to be stationary in the night sky.
Do stars emit light only during the night?
We can see nearly ______ stars with the naked eye in the dark night.
