Week Seven

1: Life Cycles of Stars

- Stars generate energy through nuclear fusion, not combustion. This was very interesting because this was something I was unaware of

- There are a lot more steps to the life cycles of stars than I previously knew

- Earth is a mixture of multiple stars instead of just one little thing

- Stardust is the base for all things

2- Galaxies

- Galaxies are not just made of stars; there is a lot of other things like gas, dust, dark matter, and supermassive black holes

- Three different types of galaxies: spiral, elliptical, and irregular

- We learned that there is a black hole in the center of the Milky Way

3- Origin of the Earth

- Earth was not formed during the Big Bang

- Earth is only 4.6 billion years old

- An Iowa scientist determined the age of Earth in the 1950s

4- Black Holes

- Black holes are actually pretty small in size

- They form from the collision of stars

- If you fell into a black hole, you would be stretched into human spaghetti

5- Past present, and future, space travel

- Technology drives exploration

- NASA develops tech to explore terrain on Mars

- Space travel started with a rocket in Germany


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