© Norman Sperling, December 25, 2014
Most of my intro-astro students are diligent, and many are creative. Some of that second group aren’t in the first group. Here’s what they wrote on tests.
* [Mayans] used the sun to tell time by using steaks and shadows.
* Planets cover the same amount of mass in the same amount of time.
* [Kepler’s Third Law] The ratio of the average of a period of 2 planets is equal to the average cube of the semi-major axis.
* The period of rotation is proportional to our radius or something!
* Gravity pulls on things because of heat. Sunlight is brought down to Earth with the help from gravity.
* Newtonian telescopes consists of a secondary mirror added to the side in order to create more light to see colors.
* When a meteor passes earth its tail leaves behind comets which light & burn up in the sky or atmosphere of the earth.
* Uranus reflects most of the sunlight that it absorbs.
* You can tell the age of an object by looking at the objects within them.
* You can tell how old a star is by examining its main sequence.
* Stars with darker colors are considered a lot newer.
* Sefiet variables are used to measure the distance between space and the universe.
* A supernova emerges when iron reaches the core of the sun.
* The disk which is made of “arms” is just an extension of clustures which “spirals” out & sometimes makes eddies as a result of the outward gravity for a time being able to push out a section of clustures.