sunlight; rays of the Sun
solar energy; solar power
solar year; tropical year
heliocentric orbit; circumsolar orbit
extrasolar planet; exoplanet
Sunshine Policy (South Korean policy of engaging with North Korea)
transit (of a planet) over the Sun
sun-synchronous orbit; heliosynchronous orbit; SSO
light pressure (from the sun)
solar telescope; helioscope
Day of the Sun (annual public holiday in North Korea on 15 April)
sunset morpho (butterfly, Morpho hecuba)