(Description) Figure 2 ‘The Day the Earth Smiled’. This is an annotated image of the planet Saturn and its rings taken by the NASA Cassini spacecraft in 2013. The rings are backlit by sunlight, and the Earth is just visible, appearing between two of the rings in the bottom right corner, you will need to click to view a larger version of the image to see it.

Week 1: Planets and the Solar System

This is an image of the planet Saturn and its rings. The rings are backlit by sunlight and the Earth is in there between two of the rings in the bottom right corner.

1 What is a planet?