1. the rising of the Earth above the horizon as seen from the Moon or another celestial body
Usage: often capitalized when referring to the famous 1968 photograph taken during Apollo 8

Examples

• The astronauts witnessed a spectacular earthrise as they orbited the Moon.
• The Earthrise photograph became one of the most iconic images of the 20th century.
• From the lunar surface, earthrise occurs at regular intervals due to the Moon's rotation.
• The sight of earthrise inspired many people to think differently about our planet.
• Astronauts described earthrise as a breathtaking and humbling experience.