In our galaxy, there might be 500 million planets capable of hosting life.
Scientists looking for alien life concentrate on "Goldilocks Planets," which are planets that fall inside a star's habitable zone. Planet Earth appears to have just the ideal circumstances for life to exist - its distance from the Sun means the temperature is appropriate, water can exist as both a liquid-solid and a gas, and the perfect combination of chemical components is available to develop complex living forms. Other planets with comparable characteristics are referred to be Goldilocks worlds. There are 500 million possible Goldilocks planets in the Milky Way alone, therefore if life can exist other than Earth, there are a plethora of potential worlds on which it may thrive. If these figures are exten