Reference no: EM132536292

Why did ancient peoples carefully observe the night sky and is this knowledge still important today? Provide three examples:

Observation of the night sky done in ancient times. (Provide 3 examples)

Example of how this was done in ancient times. (Provide 3 examples)

Is this knowledge still important today? Explain. (Provide 3 examples)

How will constellations change over time? Why haven't they changed in appearance since they were named by ancient cultures?

What is the celestial sphere? Why is it called a projection? Basics of Astronomy: The Celestial Sphere and The Celestial Sphere [720p].

What are three celestial objects that can be seen in the night sky, even in the city? Why wouldn't we see the same objects as in the city?

What is the name of the apparent annual path the celestial bodies follow across the sky? Why do they appear to follow the same path?

If planets always follow their orbits around the sun, why does Mars appear to move backwards at times? Why do some other visible planets not appear to do this?

Describe three important applications of artificial satellites and the types of satellites that perform these functions:

Application

Type of Satellite

Typical Orbit Height

At the height of a typical satellite, the pull of gravity toward Earth is about 90% of the pull at the surface of Earth (pretty strong!). Why do satellites not fall out of the sky as soon as they are launched?

What is GPS and how is it useful? Why do you think three GPS satellites must be visible at any one time by a GPS receiver on the ground?

Why is Einstein's Relativity important?

How is the satellite technology RADARSAT important to Canada? How could surveillance satellite technology be beneficial? Explain.