Sky Guide features a widget for tracking the appearances of the Sun, Moon and brightest planets. It can be added to your Today View or Home Screen.
To add the Sky Guide widget in Today View, swipe right from the left edge of the Home Screen or the Lock Screen, then scroll down until you see the Edit button. Tap the + icon at the top of the screen to open the widget gallery and scroll until you see Sky Guide.
A similar process can be followed for adding the widget to your Home Screen. Go to the Home Screen page where you want to add the widget, then touch and hold the Home Screen background until the apps begin to jiggle. Repeat the steps above.
For more advanced configuration of widgets, see Apple Support.