Bookmarks are a listing of Astro locations which you can add too. This page is designed to make life a lot easier than having to save important astro coordinates in a .txt file or your ingame Notes screen. Bookmarks can be automatically added by going to the Astro screen and clicking 'Bookmark' just to the right of the coordinates. You can also add them manually on the bookmark screen itself.
Comments can be added to the bookmarks and can be ordered as you choose to make them easier to categorise for personal use. Free accounts only have access to 15 bookmark locations while upgraded accounts can have up to 30. Bookmarks can be deleted to make room for new ones at will.