Space.com Astronauts' Back Pain Has Surprising Cause 2016-10-26T16:53:00.000000Z Doctors to astronauts: We've got your back. Some Alien Worlds Could Have 'Too Much' Water for Life 2016-10-26T16:36:00.000000Z Liquid water is essential for life as we know it — but too much water could stop the evolution of complex lifeforms in its tracks. Proxima b Might Be a Habitable 'Ocean Planet' 2016-10-26T16:01:00.000000Z The entire surface of Proxima b — the possible Earth-like planet orbiting our closest star, Proxima Centauri — may be covered in a liquid ocean, according to new models created to simulate the planet’s mysterious composition. Catch Stunning Lineup of Venus, Saturn and Antares in Thursday's Evening Sky 2016-10-26T16:00:00.000000Z About a half-hour after sunset Thursday evening (Oct. 27), look low in the southwest sky to spot a planetary/stellar lineup of two bright planets and one of the brightest and most colorful stars in the sky. Hyperloop Pod Hovers for the First Time 2016-10-26T15:56:00.000000Z The University of Cincinnati's Hyperloop pod prototype achieved magnetic levitation and is headed to a test track at SpaceX headquarters in early 2017. Space Foundation CEO Resigns Amid Criticism 2016-10-26T15:48:00.000000Z Elliot Pulham, the longtime chief executive of the Space Foundation, has resigned effective immediately, the organization announced Oct. 24. Another U.S. Air Force Weather Satellite Just Broke Up in Orbit 2016-10-26T15:36:00.000000Z A third U.S. Air Force weather satellite that launched more than 20 years ago has broken up in orbit, Air Force Space Command disclosed Monday evening. White House Announces Small Satellite Initiative 2016-10-26T15:19:00.000000Z The White House announced a new initiative Oct. 21 to promote the development of small satellites, collecting under one roof a number of efforts, some of which started months ago. Classified Shuttle Missions: Secrets in Space 2016-10-26T11:49:00.000000Z A handful of the 135 space shuttle missions were classified, and little is known about these secret missions, even 30 years after the fact. Surprise! Cold Gas 'Halos' Found Around Brightest Objects in Universe 2016-10-26T10:01:00.000000Z A new survey suggests that gas halos around distant galaxies are colder and more common than previously believed, which could throw off some theories about galaxy formation.