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.
Hingga saat ini, itulah tata surya -- empat planet seperti Bumi dengan jari-jari kecil lebih kecil daripada dua kali ukuran Bumi. Planet itu Merkurius, Venus, Mars, dan tentu saja Bumi, lalu dua planet raksasa.