October 21, 2015 Hubble Space Telescope marks 25th anniversary in orbit this week One of NASA's crowning glories, the Hubble Space Telescope, marks its 25th anniversary this week.
October 21, 2015 Scientists discover Earth’s ‘Star Trek’-style invisible shield A team of scientists led by the University of Colorado Boulder has discovered an invisible “Star Trek”-style shield that blocks so-called “killer electrons” 7,200 miles above Earth.
October 21, 2015 Saturn's weird fast-changing ring baffles scientists One of Saturn's iconic rings looks much different today than it did just a few decades ago, and scientists aren't sure why.
October 21, 2015 Mysterious 'magic island' unveiled as Saturn's moon warms Scientists are as giddy as an enchanted snowman, as summer solstice approaches on Titan, Saturn's largest moon
October 21, 2015 NASA finds star as cold as North Pole A brown dwarf as cold as the North Pole has been discovered lurking remarkably close to our solar system, and it appears to be the coldest of its kind yet found, scientists say.
October 21, 2015 New poll says Big Bang theory a big question for many Americans While scientists believe the universe began with a Big Bang, most Americans put a big question mark on the concept, an Associated Press-GfK poll found.
October 21, 2015 NASA's newest Mars flyer will explore atmosphere NASA hopes its newest Mars spacecraft lives up to its know-it-all name.
October 21, 2015 Earth 2? Scientists study rocky, Earth-sized planet 700 light years away A planet with a similar mass and size to our own planet Earth, likely similarly composed of rocks and iron, has been spotted orbiting a star some 700 light years away, in the constellation Cygnus, scientists announced Wednesday. But don’t expect to find you 2.0 living there.
October 21, 2015 Number of confirmed alien planets nears 1,000 Just two decades after discovering the first world beyond our solar system, astronomers are closing in on alien planet No. 1,000.
October 21, 2015 Smallest planet yet found outside solar system Astronomers searching for planets outside our solar system have discovered the tiniest one yet -- one that's about the size of our moon.
