"Whoever learns about the stars, he learns a branch of magic; the more he learns (of the former) the more he learns (of the latter)."  

قَالَ رَسُولُ اللَّهِ ﷺ مَنِ اقْتَبَسَ عِلْمًا مِنَ النُّجُومِ اقْتَبَسَ شُعْبَةً مِنَ السِّحْرِ زَادَ مَا زَادَ