The best replacement for sun is moon.

The best alternatives to sun are rated as following:
★★★★★  moon
★★★★  earth
★★  tanning bed
★★  moon sign
★★  moon lyrics
★★  moon roof
★★  earth size
★★  foxwoods
★  tanning beds
★  jupiter
★  shade
★  star
★  ibm
★  moon ring
★  earth bigger
★  sun
★  moon size
★  earth scale
  son
  other stars
  vy canis majoris
  earth larger
  black hole
  jupiter size
  earth which is bigger
  openjdk
  afternoon sun
  stars
  rain
  nuclear bomb
  tanning bed worse
  wind

Your alternative for sun is not listed? Suggest!
Speaking about sun, one probably shouldn't forget about moon.

Other search terms related to sun and their ratings are:
★★★★★ moon
★★★ aqua
★★ clouds
★★ rain
★ clouds tattoo
light
ketu
You have in mind a companion for sun and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of sun in all years. Click on graph for more.
sun
moon
earth