Virtual Observing the Sky
1. Why is Saturn so close to the Ecliptic line?
Because all the planets rotate around the Sun counterclockwise.
Since they all rise in the east.
Most of the planets orbit close to the plane of the Earth's orbit.
The Big Dipper or Ursa Majoris, the well known northern constellation will return to
Exactlythe same position in an observer's sky in what time period, in solar time?
A) 24 hours exactly;
B) 24 hours 4 minutes;
C) 7 days, 4 minutes;
D) 23 hou
1. 1 arc minute is equal to
1/60 of a full circle.
1/60 arc second.
2. What is the Moon's approximate diameter if it subtends about 30 arc minutes in the sky and is at about 400,000 km from the Earth at
the time of observation?
Build a Planet
1. what would be the greatest mass for the earth (assuming the same size) that would allow
the Nitrogen to escape from the atmosphere [as a ratio of its present mass]? (Complete)
Planet Mass (Earth=1)
2. What would be the le
Chapter 1 Vocab
Universe: is the totality of all space, time, matter, and energy. (p.4)
Astronomy: is the study of the universe. Branch of science dedicated to the study of everything in the
universe that lies above Earths atmosphere. (p. 4)
1. About what is the average length of the sunspot (number) cycle?
a. 10.5 yrs; b. 11.0 yrs; c. 11.9 yrs; d. 22 yrs.
2. What is the typical shape of the sunspot cycle? (i.e., the time to rise from minimum to
maximum compared with the t
Chapter 1 review
1 Compare the size of Earth with that of the Sun, the Milky Way galaxy, and the entire
a Looking at the data in the text, we can see that the diameter of the Sun is about 100 times
that of Earth, about 1,500,000 km for the Sun c
Submitted by Jeckewicz, Cynthia (5001050686) on 3/4/2013 10:04:15 PM
The jovian planets
A) all have rings around their equators.
B) all lie less than 5 AU from the Sun.
C) all spin slower
Submitted by Jeckewicz, Cynthia (5001050686) on 3/26/2013 4:02:32 PM
Mercury's Caloris basin is aptly named, since:
A) it is the largest impact basin found in the solar system.
B) it is the region