Astronomy worksheet questions 
?
How did Harlow Shapley determine where the center of the Galaxy lies?
a) He plotted the distribution of open clusters.
b) He plotted the distribution of globular clusters.
c) He made star counts in every direction of the galactic disk.
d) He measured the amount of dust obscuration in every direction of the galactic disk.
How is the age of the galaxy determined?
a) Measuring the metallicity of Population II Stars.
b) Finding the turnoff point in the H-R diagram of globular clusters.
c) From the motion of stars in the galactic halo.
d) Counting the number of open clusters in the spiral arms.
_________ are produced when two Galaxies pass near each other and pull large streamers of stars, gas, and dust away from the galaxies.
a) Ring galaxies
b) Spiral galaxies
c) Rotation curves
d) Tidal tails
e) Irregular galaxies
> How did Harlow Shapley determine where the center of the galaxy lies?
b) He plotted the distribution of globular clusters.
Here is the basic idea: http://www.uni.edu/morgans/astro/course/Notes/section3/shapleymodel.gif
> How is the age of the galaxy determined?
b) Finding the turnoff point in the H-R diagram of globular clusters.
Globular clusters contain the oldest stars in the galaxy and the turnoff point method allows to calculate their age
> _________ are produced when two galaxies pass near each other and pull large streamers of stars, gas, and dust away from the galaxies.
d) Tidal tails
Here is an animation: http://irfu.cea.fr/Images/astImg/1384_5.gif
Authors@Google: Salman Khan
|
|
Bill Nye the Science Guy: Outer Space Way Out There! [VHS] $12.99 When you look at the night sky on a clear dark night, you can see thousands of stars. There are far more than you could count. And, they are way out there. They are very, very far away. It’s about the hardest thing to imagine about space. Let’s talk about the nearest star to us, the Sun. If somehow outer space were not an icy cold vacuum with nothing to eat, drink, or breathe, and we could drive t… |
|
|
Lecture Tutorials for Introductory Astronomy (2nd Edition) $28.31 Funded by the National Science Foundation, Lecture-Tutorials for Introductory Astronomy is designed to help make large lecture-format courses more interactive with easy-to-implement student activities that can be integrated into existing course structures. The Second Edition of the Lecture-Tutorials for Introductory Astronomy contains nine new activities that focus on planetary science, system … |
|
|
Is a Blue Whale the Biggest Thing There Is? (Robert E. Wells Science) $3.27 The blue whale is the biggest creature on Earth. But a hollow Mount Everest could hold billions of whales! And though Mount Everest is enormous, it is pretty small compared to the Earth. This book is an innovative exploration of size and proportion…. |
|
|
Wishing on a Star: Constellation Stories and Stargazing Activities for Kids (Gibbs Smith Jr. Activity) $4.89 Young camping fans and outdoor enthusiasts will discover a wealth of fun activities, adventures, advice, and recipes in this easy-to-read nature book written especially for children ages 6-10. In Wishing on a Star, the night sky becomes an astronomy classroom as children discover how to study star maps, find constellations, hone their stargazing skills, and learn the legends behind some of the con… |