1. the side of a planet or moon that faces the sun and receives sunlight
Usage: astronomy

Examples

• The dayside of Mercury reaches temperatures of over 800 degrees Fahrenheit.
• Scientists studied the atmospheric conditions on Venus’s dayside.
• The dayside of the Moon experiences two weeks of continuous sunlight.
• Temperature differences between the dayside and nightside can be extreme.
• The spacecraft will orbit to observe both the dayside and nightside of the planet.
• Weather patterns on the dayside differ significantly from those in shadow.