Why is it so hot in the first place? Within the Sun's core the pressure is so great and the hydrogen atoms are moving so fast that when they collide they fuse (stick together) to form helium. The cool part is that the helium (and the stray . . . — — Map (db m213235) HM
It’s really hot, really rocky and it’s blasted full of craters! Ya’ gotta love this spunky little planet!! It’s named for the winged messenger of the gods because it moves so quickly across the night sky. Compared to our year of 365 days, Mercury . . . — — Map (db m213236) HM
Early Romans named the dazzling white planet Venus, after their goddess of love and beauty. Venus is sometimes called Earth's sister planet because both are about the same size, composition and age. But conditions on the two planets are very . . . — — Map (db m213237) HM
Playing with a globe did you ever notice how perfectly South America seems like it would fit right into the side of Africa? 250 million years ago the land masses did exist as a single super continent called Pangea. Thanks to plate tectonics or . . . — — Map (db m213238) HM
This blood red planet was named Mars after the Roman god of war. The symbol for Mars portrays his shield and spear. Mars has two very small lopsided moons named after the two horses that pull his chariot — Deimos (Terror) and Phobos (Fear). The . . . — — Map (db m213240) HM
