... All were taken on March 29, around.. A Higher Dimensional Universe . ... Colorful Water Clouds Over Mars . ... The Hydra Cluster of Galaxies contains well over 100 bright galaxies - but perhaps fewer galaxies than might be expected from its mass. ... Forty years ago, on April 12, 1961, Soviet cosmonaut Yuri Alexseyevich Gagarin became the first human in space. ... On April 12, 1981, twenty years ago today, the Space Shuttle Columbia became the first shuttle to orbit the Earth. ... April 2003 . ...