... Could an asteroid destroy civilization on Earth? ... NGC 1818: A Young Globular Cluster . ... Back in the old days, back when our Galaxy first formed, perhaps thousands of globular clusters roamed our Galaxy. ... A mere 6,000 light-years distant and sailing through the constellation Vela, star cluster RCW 38 is full of powerful stars. ... Spring Dust Storms at the North Pole of Mars . ... The December solstice brings the beginning of Winter to Earth's Northern Hemisphere and Summer time to the South...