NAME: ______________________________________________
Angular Size Problems
MOON
Diameter = 3,474 km
Distance (Perigee) = 362,570 km
Distance (Apogee) = 405,410 km
DATE: ________________________
SUN
Diameter = 1.39×106 km
Distance (Perihelion) = 147×106 km
Distance (Aphelion) = 152×106 km
EARTH
Diameter = 12,742 km
1. Calculate the angular size of the Sun and Moon as seen from Earth during an
annular eclipse. How big is this relative to the size of your handy tools?
2. Calculate the angular size of the Earth in the sky as seen from the Moon.
How big is this relative to the size of your handy tools?
3. The image to the right is the planetary nebula
called the Saturn Nebula. These objects tend to
be about 1 light year across. How far away is the
Saturn Nebula?
.
Image Size
0.083° × 0.083°
4. The image to the right is the barred spiral galaxy
called NGC 1300. This object is 61,300,000 light
years away. What is its true diameter?
Image Size
0.25° × 0.25°