NATS 1745 Lecture Notes - Lecture 1: Magellanic Clouds
12 May 2016
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Document Summary
Comets (junks of rock and ice, trapped by sun"s gravity) Comets are periodic thing, come from near pluto, go around sun and go back out. Rotates on its axis\understanding the motions of objects in the sky is key for understanding the cosmos. Responsible for driving astronomical knowledge and scientific revolutions throughout history. 7 bright lights in the sky: sun moon mercury venus mars jupiter saturn. Give rise to the significance of 7" in many cultures. Sun rises in east and sets in west. Rises and sets due to rotation of the earth on its axis. Path of the sun changes through seasons (higher in the summer in the northern hemisphere- days are longer compared to winter) and it happens because the revolution of the earth in its orbit around the sun. And tilt of the earth"s rotation axis (earth rotates 1x 24hours and earth revolves 1x year around the sun)
