Today's Date:Saturday March 20, 2010
ASTR116/116H Introduction to Astronomy
Glossary of 1600 astronomical terms from A
to Z
Using your CD-ROM and the Internet as learning tools
- View the book on your CD-ROM using your favorite Web browser. Old 4th edition only.
- Study the animations and videos.
- Link to the publishers website for online study guides, quizzes,
and the latest images and news:
- http://www.prenhall.com/chaisson/details4.html
For each chapter (online at textbook website)
Review LEARNING GOALS.
Take the online tests.
Link to DESTINATIONS for more information, images, videos, and
simulation.
Before a test, for each chapter
- Read the Chapter Summary.
- Review Learning Goals.read each one and explain it to your
grandmother.If you cant explain it, review the appropriate sections.
- Link to the online Study Guide and answer all the questions.
- See Glossary for unknown words.If not there, consult dictionary.com
Useful numbers (see the Appendix in your book for more)
Scientific (powers of ten) Notation
150x10^6 = 150x106 = 150 x 10 to the 6th power = 150 x
10x10x10x10x10x10. This means 150 followed by 6 zeros, that is
150,000,000 or 150 million.
- 1 mile (mi) = 1.6 kilometers (km), 1 kilometer = 1000 meters
(m),
1 meter = 100 centimeters (cm), I inch = 2.54 centimeters.
- 1 light year (ly)=9.46x1012 km (= 9 trillion km)
=5.88x1012
mi.(= 6 trillion miles)
- 1 parsec (pc)=3.26 ly.
- speed of light c=3x108 m/s = 3x105 km/s =
186,000 miles/second.
- 1 year = 31.6 million seconds = 365.25 days
You should memorize the following numbers:
- Earth-Sun distance = 1 AU = 150 million kilometers = 93 million
miles.
- The Sun is 100 times bigger than the Earth.
- Sun-Pluto average distance = 40 AU (~size of solar system).
- Average distance between stars in the Milky Way (near the Sun)
~
a few light years ~ 1pc.
- Diameter of Milky Way ~ 100,000 ly ~ 30,000 pc..
- The Sun is 26,000 ly ~ 8,000 pc from Milky Ways center.
- Average distance between galaxies ~ a few million light years ~
1
Mpc (1 megapaececs) M= Mega = 1 million.
- Age of the Earth = 4.5 billion years.
- Age of Universe ~ 14 billion years (best value = 13.7 billion
years
- February 2003).
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