1. What did Feynman say about how Science works?

Feynman simply explains how to find a new law in science: first we guess it, then we compute the consequences of the guess to see if its right through experiments/nature/observation. If it disagrees with experiment its wrong. He says that that simple statement is the key to science and it doesn't matter who or when the guess was made.

2. How does spectroscopy tell us what Stars are made of?

When elements are heated they emit light at certain wavelengths which we perceive as colors. Spectroscopy analyzes all the wavelengths in a particular beam of light and this information can be used to determine what elements the source of the light contains. So with any object that emits light, we can determine what
*…show more content…*

We can then determine how far away the galaxy is by observing the brightness of the stars. If a galaxy is too far away for us to distinguish individual stars, astronomers can use SuperNovas. We know from experience how much light output a SuperNovae emits, so we can determine how far away the galaxies are. Supernovae’s can be used to measure the distance to galaxies as far as 10 billion light years away.

5. What is the Hubble Law, or Hubble Constant?

The Hubble Constant is the unit of measurement used to describe the expansion of the universe. The Hubble Constant states that the farther a galaxy is away from us, the faster it is moving away from us. Hc = 42 miles/second ÷ 3 million Light Years

6. How do we get the age of the universe?

We can get the age of the universe simply by reversing the equation. Light travels incredibly fast, around 186,000 miles per second. First we need to calculate how fast light travels in a year:

186,000 mi/sec (3600s/1hr)(24hr/1day)(365day/1year) = 5.866 x 1012

That's how far light travels in 1 lightyear, so now we multiply by 3 million:

(5.866 x 1012)(3 x 106) = 1.76 x

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