This site is for students taking Astronomy with Ms. Barajas at Coronado High School.
The 7 day week and the meaning of the names.
Why is the sky blue?
Remember, the Sun looks yellow, but it's actually giving off white light. When that light is split with a prism, we see a rainbow. The longer wavelengths (yellow, orange, red) pass straight through the Earth's atmosphere. Blue light (shorter wavelength) is absorbed by atmospheric gas. The blue light is then scattered in all different directions (it's excited). Where ever you look, your eyes perceive the color blue in the sky.
Can you hear sound in space??
In space, no one can hear you scream!
In empty space, there is no air, and what we call "sound" is actually vibrations in the air.This includes "sound" from explosions. Because space is a vacuum, gases released into space expand very quickly, and as they expand their density decreases. Sound waves would not be able to travel through air waves that exploding gas would create.