ASTR 1101 Chapter : Astronomy 1101
Document Summary
What are the most exciting things in astronomy today: exoplanets, new horizons mission to pluto, curiosity rover on mars, What causes the seasons: the earth"s tilt. What is a star: undergoing fusion (fusing hydrogen atoms into helium atoms in its core, planets- things going around stars. Natural satellite- something that naturally moves around something. Unnatural satellite- something that"s manmade that moves around something. New moon: you can"t see the moon when it is a new moon because the dark side is facing us. Follow the moon: go outside on 5 clear nights & see what the phase of the moon is, mark the position of the moon on the star chart, moon, position, & date. Hubble space telescope: outside of the atmosphere, so it takes very clear picture. Radio waves= speed of light= 2. 998 x 10^10 cm/s: i au= 1. 496 x 10^13 cm. How did astronomy get started: they have always cared for navigation and seasons for farming.
