The best replacement for earth is mars.

The best alternatives to earth are rated as following:
★★★★★  mars
★★★★  flying saucers
★★★  earth
★★  sun
★★  moon
★  venus
★  sun bigger
★  old earth
★  earth grammar
★  moon bigger
★  jupiter
★  terra
★  world
  not earth
  earth capitalization
  mars bigger
  wildhearts
  fire
  sun size
  venus bigger
  new earth
  saturn
  its atmosphere
  venus size
  ground
  sun larger
  globe
  sun which is larger
  life
  pluto
  altair queen of outer space
  mars closer to the sun
  world wind
  google earth
  mercury
  in heaven
  virtual earth

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

Other search terms related to earth and their ratings are:
★★★★★ moon
★★★ no moon
★★★ plate tectonics
★★ greenhouse effect
★ an atmosphere
★ latitude
★ street view
★ longitude and latitude
atmosphere
latitude and longitude
You have in mind a companion for earth and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of earth in all years. Click on graph for more.
earth
mars
flying saucers