stars
What is the composition of a star?
Hydrogen and Helium.
do scientist believe The universe is finite and expanding.
yes, scientist believe that The universe is finite and expanding.
If a star is moving away from us, the light gets stretched out.
what happens when a super giant explodes into a super nova>
hydrogen adn helium are ejected and other heavier things
name one important star?
Polaris the star
How light show composition?
when the star burns it gives off certain color of lights. The color of light corresponds to a specific wavelength of light.
do most scientist believe that All matter, energy, and space was once squeezed into a very small volume.
yes, scientist believe All matter, energy, and space was once squeezed into a very small volume.
What is doppler effect?
The sound waves are compressed in front of something and make a high frequency sound.
name another important star?
Alpha Centauri
How light shows composition?
Astronomers match up the lines on the spectrum
coming from a star with the dark lines different
elements produce when they burn to determine
the composition of the star.
do most scientist believe that the universe was created 13-14 million years ago?
No, most scientist believe that it was made 13-15 billion years ago
if a star is moving toward us, does the light get squeezed in.
If a star is moving toward us, the light gets squeezed.
The brightness of a star as seen from earth
apparent magnitude
How long ago did the big bang theory happen?
13.7 billion years ago
do galaxies expand like a cake with raisins being bakes
yes it does