Up until recently, that was the Solar System -- four Earth-like planets with small radius, smaller than about two times the size of the Earth -- and that was of course Mercury, Venus, Mars, and of course the Earth, and then the two big, giant planets.
Até há pouco tempo, isto era o sistema solar: quatro planetas semelhantes à Terra com órbitas de raio pequeno, mais pequenos duas vezes do que o tamanho da Terra. Eram, claro, Mercúrio, Vénus, Marte e, claro, a Terra, e os dois grandes planetas gigantes.