Final answer:
The author most likely uses this imagery to allow readers to place themselves in the act of stargazing.
Step-by-step explanation:
The author most likely uses this imagery to allow readers to place themselves in the act of stargazing. By describing the experience of floating on beams of light and among the planets, the author creates a vivid and immersive image that readers can imagine themselves in. This helps to engage the reader's imagination and create a sense of wonder and awe.