Our Modern View of the Universe with Dr. Tony...
Transcript of Our Modern View of the Universe with Dr. Tony...
Our Modern View of the Universe
with Dr. Tony Crider
Student Learning Objectives
• Define “AU” and “ly.”
• Watch Powers of Ten.
• Determine our address.
galaxy staruniversesolar system
A
C
B
D
Which of these is the largest?
1 AU =
1 ly =
1.495979 x 1011 m
9.46053 x 1015 m
average distance between the Earth and the Sun
distance that light travels in one year
Proxima Centauri SunMoonPluto
A
C
B
D
Which of these is 4.2 light-years away?
Proxima Centauri SunMoonPluto
A
C
B
D
Which of these is 1.3 light-seconds away?
8 light-secondsA
C
B
D
How far away is the Sun?
8 light-minutes
8 light-hours 8 light-years
What is our address?
SOLAR SYSTEM
SOLAR SYSTEM
SOLAR SYSTEM
GALAXY
GALAXY
GALAXY
CLUSTER
CLUSTER
SUPERCLUSTER
SUPERCLUSTER
UNIVERSE
Powersof
Ten
14 thousand yearsA
C
B
D
How old is the Universe?14 hundred years
14 million years 14 billion years
Student Learning Objectives
• Define “AU” and “ly.”
• Watch Powers of Ten.
• Determine our address.
Lecture Notes: The Scale of the UniverseBad Astronomy: Star Naming for Dummies
MasteringAstronomy: Scale of the Universe