Signs in the Subjection of Night and Day, the Sun and the Moon, and in that which grows on Earth

Allah mentions the mighty signs and immense blessings to be found in His subjection of night and day, which follow one another; the sun and moon, which revolve; the stars, both fixed and moving through the skies, offering light by which people may find their way in the darkness. Each of (these heavenly bodies) travels in its own orbit, which Allah has ordained for it, and travels in the manner prescribed for it, without deviating in any way. All of them are under His subjugation, His control and His decree, as Allah says:

إِنَّ رَبَّكُمُ اللَّهُ الَّذِى خَلَقَ السَمَـوَتِ وَالاٌّرْضَ فِي سِتَّةِ أَيَّامٍ ثُمَّ اسْتَوَى عَلَى الْعَرْشِ يُغْشِى الَّيْلَ النَّهَارَ يَطْلُبُهُ حَثِيثًا وَالشَّمْسَ وَالْقَمَرَ وَالنُّجُومَ مُسَخَّرَتٍ بِأَمْرِهِ أَلاَ لَهُ الْخَلْقُ وَالاٌّمْرُ تَبَارَكَ اللَّهُ رَبُّ الْعَـلَمِينَ

Then, in verse 13, after mentioning all other varied produce of the land, it was said: إِنَّ فِي ذَٰلِكَ لَآيَةً لِّقَوْمٍ يَذَّكَّرُ‌ونَ (Surely, in that, there is a sign for a people who accept advice). The sense is that no deep thinking is needed here as well - because, the proof has been furnished openly. But, the condition is that one must look at it carefully and learn his lesson. Otherwise, one who has no sense or concern and who just pays no attention could hardly hope to benefit from it.