Astronomical alignment
Else clues• Alignment of celestial bodies
• Alignment of the sun, earth and moon, e.g.
• Black and white or sun and moon
• Celestial line-up
• Eclipse cause
• Highest-scoring Scrabble word that doesn't use A, E, I, O or U
• Three celestial bodies in a straight line
• The straight line configuration of 3 celestial bodies (as the sun and earth and moon) in a gravitational system