(Make sure you are indeed in ASTR 104.
The ASTR 103 class has
a different set of
Pass or fail test questions
Students must pass this test once during
the semester, but may try three times.
The passing level is 90%.
Astronomy Test 3 Study Guide
1. All stars are born in clusters but are soon expelled
2. Half of the stars are doubles
3. How do we know the distance to Stars?
i. Close-by stars seem to move in tiny circles, once a year
1. Reflection of the mot
Test 1 Information
1. Over a period of 6 month the star 61 Cygni shows a parallax angle of .286
seconds of arc. How far away is it in parsecs?
2. How many seconds are there in a year?
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30 . ommcrs
Astronomy 103 Test 30 March 2012
Lewis 101 Thursday 1:00 1
USEFUL INFORMATION - I. . v- p
During one half life, half of-the atoms of a radioactive isotope
will decay. .
The area of a circle _is proportimal to diameter s
"mar +6314?) "
k or Scanners
"Astronomy 103 Test 23 Feb 2012 max_ gain
USEFUL INFORMATION Lab Day and Time M 9'
The square of the period of a planet's orbit is proportional to v
the cube of the size of its orbit's sani-major axis.
Astronomy 104, Spring 2012
Print your name:
Make sure your scantron has your name and code on it.
Show a picture ID,
turn in the test paper with the scantron.
It is advisable but not required
to fill in the answers on the test paper.