Messier Finder Discover which messier objects are in the night sky; and when and how you can observe them. Discover which Messier objects are in the night sky and when and how you can best observe them. Pick a location and date to observe Find out when it is truly dark. Discover which Messier objects can be observed at this time and location Locate the Messier object in the sky. Google Play and the Google Play logo are trademarks of Google Inc. Discover which Messier objects are in the night sky and when and how you can best observe them. Pick a location and date to observe. Find out when it is truly dark. Discover which Messier objects can be observed at this time and location. Locate the Messier object in the sky.