Guide to your health and safety is the ultimate reference manual of symptoms, facts relating to disease and illness, and preventative health care.
For centuries, space travel was just a dream. Now rockets, shuttles and satellites hurtle towards distant planets and stars. Join their mission to explore the unknown.
Planet kita, Bumi, hanyalah setitik debu di lautan hitam amat luas dari alam semesta. "Tetangga" kita adalah Matahari, Bulan, "teman-teman" sesama planet, dan komet menyala yang melintas di angkasa. Namun, jauh di sana banyak galaksi raksasa yang dipenuhi miliaran bintang.