The Doppler effect is a property of sound that states that if the object emitting the sound is closer to the observer it will sound louder and if it it's far away from the observer it sounds less loud.
Examen this model. What do you observe?
As you can see in this model as the rock spins away from me the sound become less loud to me. To him it sound louder as it is getting closer to him.
The Doppler effect is caused by the shortening or lengthening of the sound waves. The longer the time it takes to get to your ear the longer the sound wave and lesser while its the complete opposite when it take less time for it to reach your ear. It's similar to how light waves become redder and longer it travels to to your eyes and how it is more blue when the light waves are closer to you.
The Next day... Big history lesson: Religion in Astronomy
Today we will be talking about Religious influences in astronomy. We will be focusing on the two major influences...
The setbacks and the advancements that religion has caused within the astronomical community.
Some of the advancements in astrology brought about by religion include: The many discoveries of the Vatican Observatory and perhaps the inspiration for many to study the cosmos. Finally the most important advancement is that of the big bang theory created by the catholic priest Georges Lemaître.
Another major advancement of the Vatican Observers was the introduction of classifying stars based on their spectra.
Some of the set backs brought about by religion are: The refuting of the heliocentric model of the solar system by the Catholic Church, the many times scientist have been condemned for their beliefs by more than just the Catholic Church, and the times religions banned certain book with views contrary to their own.
Nowadays most religions don't intervene heavily in preventing certain views. So, while the some religions might oppose something that is true by accident they don't try to completely kill the idea.