Download homework assignment 3

yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Corona Borealis wikipedia, lookup

Ursa Major wikipedia, lookup

CoRoT wikipedia, lookup

Chinese astronomy wikipedia, lookup

Serpens wikipedia, lookup

Aries (constellation) wikipedia, lookup

Auriga (constellation) wikipedia, lookup

Cassiopeia (constellation) wikipedia, lookup

Corona Australis wikipedia, lookup

Theoretical astronomy wikipedia, lookup

Canis Major wikipedia, lookup

Boötes wikipedia, lookup

Dyson sphere wikipedia, lookup

History of astronomy wikipedia, lookup

Stellar evolution wikipedia, lookup

Cygnus (constellation) wikipedia, lookup

Cosmic distance ladder wikipedia, lookup

Star formation wikipedia, lookup

Star of Bethlehem wikipedia, lookup

Lyra wikipedia, lookup

Perseus (constellation) wikipedia, lookup

Observational astronomy wikipedia, lookup

Timeline of astronomy wikipedia, lookup

Aquarius (constellation) wikipedia, lookup

Corvus (constellation) wikipedia, lookup

Ursa Minor wikipedia, lookup

Astronomy 100
Homework 3
Due Monday, April 22, 2013 at 5 p.m., either electronically or on paper.
1. Most astronomy textbooks use planets orbiting the Sun to illustrate the relevance of
Kepler’s third law of planetary motion. In a class on stars and galaxies, describe a more
relevant example of Kepler’s third law (i.e., where will we use this law?).
2. There’s a lot of words on pages 1 and 2 about the concept of parallax. Let’s reduce it
to one sentence – complete the following sentence: “Over the course of half a year, a
nearby star will appear…
(You are welcome to formulate your own sentence, but it should convey what parallax is
without resorting to diagrams.)
3. In section 1.2, the idea of a star’s luminosity is introduced. The text strongly implies
that the luminosity is a measure of brightness (i.e., how much light the star gives off).
But doesn’t a star also give off heat? Sure. So why is luminosity restricted to the
brightness of a star?
4. What’s the difference between the apparent magnitude of a star and the absolute
magnitude of a star? Which one is used to calculate other characteristics (like
luminosity) of a star?
5. Draw a diagram of a spectroscopy experiment. Your drawing must include a labeled
“source”, “sample” and “detector”. For extra credit, use colored pencils to indicate what
happens to the different wavelengths of light from the source that allows us to
understand characteristics of the sample.