• The Moon always presents one face to the Earth.
• Both Mercury and Venus turn ( or keep ) one face eternally to the Sun and have no solar day.
• The Moon always presents one face to the Earth.
• Both Mercury and Venus turn ( or keep ) one face eternally to the Sun and have no solar day.
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012