August 24, 2013 One of seven large mirrors for the 72-foot telescope will be spun cast at the University of Arizona on Saturday.
August 22, 2013 Scientists are always looking for a more accurate answer to the question, "What time is it?" Now they've built the most precise atomic clock yet — but it's not just telling time. It has the potential to investigate the accuracy of the General Theory of Relativity.
August 22, 2013 NASA says the small object that was caught on video by a spacecraft called the Solar and Heliospheric Observatory was most likely a member of a sun-grazing group of comets known as the Kreutz family.
August 21, 2013 NASA is bringing a retired spacecraft back into service to help search for asteroids that could pose a danger to Earth, the space agency announced on Wednesday.
August 17, 2013 The giant space rock that slammed into Chelyabinsk in February sent material into the stratosphere that circled the globe in just four days and lingered for months.
August 16, 2013 It's not the hard work that will make astronauts lose it on long planetary missions — it's boredom. And something that can become very boring very fast is a rote menu. A simulated Mars mission reveals why cooking for others will be vital on long space journeys, and why wraps rule.
August 15, 2013 Astronomers using the Hubble Space Telescope say familiar types of galaxies, such as spirals and ellipticals, were present just 2 billion years after the Big Bang.
August 15, 2013 A 10-story "Grasshopper" rocket was successfully launched, flown sideways and then brought back down. The hope is that some day such rockets can be reused instead of jettisoned and allowed to burn up.
August 14, 2013 Think about the E.T. in "E.T." It was fetching, adorable and two and a half feet tall. Now think about the E.T.s we hope to find on Mars, Europa or Titan. They will probably be, if they are there at all, microscopic. I miss big aliens. Which is why I loved reading this science paper. Could big be back?
August 9, 2013 With a new moon and dark skies, the best meteor shower of the year should be a good show Sunday and Monday nights if the weather cooperates.