+
Graphic
Fourmilab Switzerland

John Walker: Inconstant Moon: Moon at Perigee and Apogee

For Students 9th - 10th
Most people think of every full moon as appearing the same, but careful observation allows us to see that sometimes the Moon appears larger than at others. This is caused by the elliptical orbit of our natural satellite.
+
Website
Fourmilab Switzerland

John Walker: Earth and Moon Viewer and Solar System Explorer

For Students 9th - 10th
This website provides numerous images of the Earth and moon, shown from various vantage points.