Planets lining up across the sky are read as a sense that everything is coming together at the right moment. It stands for harmony, timing and many parts falling into place.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.