Starry Night can display 3D shadow cones (umbra and penumbra) for all planets, dwarf planets and moons in our solar system. To display the shadow cone for an object, open the Find pane and check the second box to the right of the object’s name. In the example below, the Earth and Moon shadow cones have been toggled on.
You can change the color of the shadow cone and select to display the umbra, penumbra or both when the shadow box in the Find pane is checked. To customize how shadows will appear, open the Options pane, expand the Solar System layer and click on “Planets-Moons”. This will bring up a new dialog window that allows you to change the display options for shadow cones.