Tag: planets

  • Which planets need to be considered Earth-like?

    Which planets need to be considered Earth-like?

    Thousands of planets have been discovered orbiting other stars, but only a few are known as Earths. There is no planet that matches our home planet, which raises the question: How similar are the planets to be called Earth-like? Also, how can we tell? And who decides? As Carl Sagan pointed out, what makes Earth…