Newscenter Update: Water-rich Planetary Building Blocks Found Around White Dwarf

October 10, 2013 Artists' concept Get larger image formats   Find the entire Hubble News archive, image galleries, and much more at hubblesite.org Stay Connected   Water-rich Planetary Building Blocks Found Around White Dwarf If you go walking along the beach or take an ocean cruise, it's hard to believe that Earth is essentially a "dry" planet. Barely 0.02 percent of our home planet's mass is surface water. In fact, our oceans came along a few hundred million years after Earth formed 4.6 billion years ago. Though still debated, astronomers think that the primeval Earth was most likely irrigated when water-rich asteroids in the solar system crashed into our planet. RELEASE LINKS: See full release More Images Fast Facts This news release and its supporting materials are permanently achived at: http://hubblesite.org/newscenter/archive/releases/2013/38/ You are receiving this email because you are subscribed to the Inbox Astronomy mailing list, which sends notices in HTML whenever there is a new Hubble Space Telescope image, product, or news update. If you would like to unsubscribe or change your email preferences, please go to: http://hubblesite.org/newscenter/hubble_on_the_go/inbox_astronomy/