Astronomy 102    Exam 1    Study Guide


Go over the suggested HW problems (Conceptual Self-Test), labs and quizzes.

Know relevant terms to prepare for the fill-in-the-black questions.

What is a constellation?  What is an asterism?

Know the first 6 Greek letters

Know the stars that make up the constellation of Orion

Know the stars and the constellations in the Orion night sky image

Know how to apply the Universal Law of Gravitation

What are the phases of matter?

Know the four forces of nature

Know how to calculate Marvin’s weight on another world.

How does the force of gravity change if you increase/decrease the mass and distance?

Which form of light has the shortest/longest wavelength and the lowest/highest energy?

Know the different types of light an object emits if heated to different temperatures

Know Wien’s Law and how it apply it

Know Stefan-Boltzmann’s Law and how to apply it

Know all three of Kirchoff’s Laws.

Where and how is energy generated in the Sun?

What regulates the temperature of the Sun?

Since the Sun is a big ball of gas, why doesn’t the Sun collapse under its own weight?

How is energy being transported in the Sun?

What are sunspots and how are they formed?   Know the sunspot cycle. 

What happens to the Sun when sunspots are present?

What are the different temperature layers of the Sun? 

Know how to identify sunspots, granules, spicules, prominences, flares, and coronal mass ejections.

What types of events eject solar material away from the sun?

What are protons, electrons, neutrons and neutrinos?

Know how to determine the distance of a star from its parallax.

Know how to apply the space velocity equation.

What are the different regions on the HR diagram?

What spectra types are hotter and cooler?  What luminosity classes are brighter and dimmer?

What types of stars have short and long lifetimes?

If a star’s temperature increases or decreases, but the luminosity remains constant, then what happens to the star?

Know how to determine brightness of an object from its magnitude.

Given a star’s apparent/absolute magnitude, know how to determine which star is brighter.

What does the star’s position on the HR diagram tell you about the star?


Challenge Problem (12%) – To prepare for the challenge problem, know all about the solar cycle, including solar features that appear during different periods of the cycle, and how solar storms may affect the Earth.