What does earthshine mean?
Earthshine refers to the faint illumination visible on the dark side of the Moon, caused by sunlight reflected off the Earth's surface. This phenomenon is most noticeable during crescent or gibbous lunar phases when the Moon is partially shaded. Earthshine provides astronomers with valuable insights into Earth's atmospheric conditions and is also a poetic term used to describe the Moon's gentle glow. The term has been used in scientific literature and poetic works to evoke a sense of celestial wonder.
nounThe faint glow of light reflected by the Earth, visible on the dark side of the Moon during certain lunar phases.
- The reflected light of the Earth visible on the Moon
- A phenomenon of reflected Earth light
"The astronauts marveled at the earthshine illuminating the lunar surface."
"The earthshine was visible to the naked eye during the crescent moon phase."
"Astronomers study earthshine to understand Earth's atmospheric conditions."
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of earthshine
The term 'earthshine' is derived from the combination of 'earth' and 'shine', referring to the light reflected by our planet. The concept has been studied in astronomy for centuries, with early observations by Galileo Galilei. The term itself has been in use since at least the 19th century.
Usage notes
Typically used in astronomical or poetic contexts.