Is Hawking's Starshot Even Possible?

TECH SPACE HUMAN EARTH HISTORY ANIMALS ADVENTURE VIDEO View Online Obama to Shine Light on Unsung Hero of Astronomy In his final DNews segment, President Obama will highlight Henrietta Swan Leavitt, whose insights helped devise a cosmic yardstick for measuring the universe.  READ MORE Is Hawking's Starshot Even Possible? Stephen Hawking has backed it.There's a $100 million investment. But can we really send nanoprobes to another star?  READ MORE WATCH VIDEO: How Come Everything in Space Is Spinning?  Most of us get that Earth and lots of other objects rotate in space -- but why?  Political Momentum: Is That a Real Thing? People often gravitate to things that are popular precisely because they are popular -- that includes political candidates. READ MORE WATCH VIDEO: How Cruz Won Colorado Without a Public Vote Donald Trump was furious after losing the state's 34 delegates to Ted Cruz. All About Galactic Walls: The Biggest Things in Space You know how hard it is to get your mind around the size of even a single galaxy in the universe? Now try to imagine a wall of galaxies cemented together by dark matter. WATCH Follow Discovery News on Facebook! Get your sci-tech headlines all day on Twitter too! At Discovery Communications, we value your privacy. If you would like to be removed from future communications like this, please click here. Privacy Policy Discovery Communications, LLC One Discovery Place Silver Spring, MD 20910 © Copyright 2015 Discovery Communications, LLC