1. The faint illumination of the dark part of the Moon caused by sunlight reflected from Earth's surface and atmosphere.
Usage: astronomy; usually used in singular form but can be pluralized when referring to multiple observations or instances

1. Third-person singular present tense of 'earthshine': to produce or exhibit earthshine; to illuminate with reflected light from Earth.
Usage: technical; rare in everyday usage

Examples

• Astronomers observed earthshines on the lunar surface during the new moon phase.
• The earthshine was particularly bright when Earth's cloud cover reflected more sunlight.
• Through the telescope, the earthshine illuminated the dark portion of the crescent moon.
• Scientists study earthshines to understand Earth's reflectivity and climate patterns.
• The phenomenon of earthshine has been documented since ancient times by lunar observers.