This image of Spiral Galaxy M106. NASA suggests that spiral galaxies get their shapes when “a close gravitational interaction with a neighboring galaxy created waves of high mass and condensed gas which continue to orbit the galaxy center.” When a galaxy is extra large, its gravity can distort nearby galaxies. Some spiral galaxies are believed to have a bar across their center, as in the case of our own Milky Way.
Tiny tardigrades, also called water bears are the first animals known to survive the pitiless rigors of space, including hard vacuum, cosmic rays, freezing cold and solar UV rays 1,000 times as strong as those experienced on Earth's surface. ... "They have claws and eyes. They are real animals. And this is the first time such an animal was tested in space," said Petra Rettberg