Final Exam Flashcards
The moon’s orbit is very nearly circular. (T/F)
True
Earth is at the very center of the moon’s orbit. (T/F)
False
When the moon is close to Earth, the moon appears slightly ___________ than average.
Bigger
What is the eccentricity of the moon’s orbit? Enter your answer as a decimal number.
.055
what is the ecliptic longitude of the moon’s perigee?
5 degrees
Last week you examined two lists of stars: the closest stars and the brightest stars. Is it fair to say that the stars we see at night – the brightest stars in the sky – are also mostly among the closest stars to our Solar system? In other words, do we see the stars we see at night mostly because they are really close to our Solar system. (Y/N)
No
About how far from our Solar system are the nearest stars?
About 1 parsec
The temperature of the sun is much greater than most of the stars on the closest and brightest star lists. (T/F)
False
What is the (B - V) color index of a main-sequence A star? Enter your answer as a number (possibly with a minus sign).
.10
What is the temperature of a main-sequence A star? Enter your answer in degrees K.
10,000
Compared to the sun, a main-sequence M star is … (select all the responses that apply).
Cooler.
Smaller.
Redder.
When is Earth at perihelion
in the beginning of January
When is Earth at aphelion
Beginning of July
Absolute magnitude of the sun
+5
How many light years is 1 parsec
3.26
