Astronomy 101 – Exam#2 – Study Guide


Go over the suggested HW problems and the Quiz.  Don’t forget the material from Exam#1 – the topics of gravity and the moon will be really useful.

Know the speed of light

Know the different forms of light in correct order from the shortest to the longest wavelengths (including the colors that makeup a rainbow)

What forms of light are absorbed by the Earth’s atmosphere?

What forms of light will an object emit at a given temperature? What changes when the object is heated?

What are the problems associated with refracting telescope designs?

What are the benefits of a reflecting telescope designs?

Know how to determine the magnification of a telescope. What happens to the image when the magnification changes?

What are the different types of reflecting telescope designs? Know the light capturing efficiency of each design.

Know how to compare the light gathering power of different size telescopes.

Are radio telescopes bigger or smaller than optical telescopes? Why?

How can you capture and store an image taken with a telescope?

Where can you place a telescope to reduce the affects of the atmosphere?

What techniques can you use to reduce the affects of the atmosphere?

If you see a bright object in the sky, how can you tell if it is a planet or a star?

Know how to calculate the speed of a wave.

Know what is and how to apply Wien’s Law.

Know what is and how to apply Stefan-Boltzmann’s Law.

Why is there such a large day-night temperature difference on the Moon?

Are the Earth’s geographic and magnetic poles aligned?

Which direction does a compass point? Why does the compass needle point in that direction? Can the direction change in the future?

What are the basic differences between the Earth and the Moon?

What process formed the craters on the Moon?

How are the lunar highlands and the lowlands formed?

Is the Earth’s surface younger or older than the Moon’s surface? What about the rocks?

Are there any differences between the near-side and the far-side of the Moon?

What planet-sized object hit the Earth?

What would happen to the Earth if we had no moon?

What causes tides?

How many high and low tides do you see each day in Puget Sound?

What is precession and what is causing it?

Why do we want to go back to the Moon?


Challenge Problem: (14%): To prepare for the problem, know how the Moon affects the Earth and know what would happen if the Earth-Moon distance changes.  If this distance increases or decreases, then know how that would affect the Earth and be able to estimate how much of a change would take place (in other words, know how to justify your arguments). Watch the movie, “If we had no moon”, to help you formulate some ideas and to better understand how or why something would happen.