وَلِلَّهِ يَسْجُدُ مَا فِي السَّمَاوَاتِ وَمَا فِي الْأَرْضِ مِن دَابَّةٍ وَالْمَلَائِكَةُ وَهُمْ لَا يَسْتَكْبِرُونَ (49)
(16:49) All the animate creation in the heavens and the earth and all the angels prostrate themselves in adoration before Allah; *42 they do not show any arrogance at all;
*42) That is, "Not only all things on the earth alone but also all things in the heavens, including all those whom people have been regarding as gods and goddesses. and considering to be closely related to AIlah arc subservient to God, and have no share whatsoever in His Godhead."
Incidentally, it implies the existence of living creatures not only on the earth but in the planets, too.