1. Star light, star bright, First star I see tonight, I wish I may, I wish I might, Have this wish I wish tonight.

2. a star begins as a huge cloud of hydrogen (nebula)

3. gravity compresses the nebula until hydrogen fuses into helium

4. once fusion happens a star is formed

5. fusion reaction:
H + H He + stuff
2 pieces of hydrogen becomes
1 piece of helium with some stuff
remaining

6. fusion creates incredible amounts of energy

7. einstein’s formula e = m c 2
e = energy
m = matter (stuff)
c = the speed of light (186,000 miles per second)

8. multiple any amount by 186,000 squared, you get a huge amount

9. red orange yellow green blue indigo violet
Stars emit this energy in the form of the electromagnetic spectrum (EMS)
radio waves white light gamma rays
least energy R O Y G B I V greatest energy
longest wavelengths shortest wavelengths
red orange yellow green blue indigo violet

10. Humans only see white light (ROYGBIV), if white light passes through a prism the light refracts (bends)

11. the amount the
light refracts
depends on
the wavelength, red bends the least and violet bends the most, this creates the rainbow of color

12. using a prism allows you to determine many characteristics of the light source
 astronomers use a spectroscope (prism) to study stars