A perfect alignment of all eight planets in our solar system

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 A perfect alignment of all eight planets in our solar system, where they line up in a single straight line, is virtually impossible. This is because the planets don’t orbit the sun on the same flat plane. Instead, they travel around the sun on slightly tilted elliptical paths.

Even a near perfect alignment, where all eight planets are clustered together in a small region of sky, is incredibly rare.

• Estimates suggest a full alignment of all eight planets within 1 degree of each other happens roughly every 13.4 trillion years.
• The next time all eight planets will be in the same 180-degree slice of sky is predicted to be on May 6, 2492.

However, we can see alignments of some of the planets from time to time. These gatherings are more frequent and don’t have any significant effect on Earth. For example, on February 28, 2025, seven of the eight planets will be visible in the pre-dawn sky.