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What he was able to do with the 1969 techniques, why doesn't it seem possible now? Landing 12 people on the moon is one of NASA's greatest achievements, if not the greatest of all. On their journey to the moon, astronauts gathered rocks, took pictures, conducted experiments, planted some flags, and then returned home. But this week-long stay during the Apollo flight was not made with the aim of a permanent human presence on the moon. More than 45 years after the last moon landing — Apollo 17 in December 1972 — there are still many reasons to bring humans back to earth's large dusty moon and stay there. Researchers and contractors believe that creating a base on the moon could serve as a fuel reservoir for deep-space flights, which could also contribute to the creation of renewable space telescopes and possibly facilitate life on Mars. Moreover, this rule will help solve ancient scientific mysteries around the Earth and make up the moon. A lunar base can become a thriving ec...

A study of the small galaxies swallowed by our nearest large galactic neighbor has revealed something of how galaxies grow. In the process, it has hinted at something that, if true, would change the way we see the universe in profound ways. All galaxies,  including our own  Milky Way, grow by consuming smaller ones. Inevitably, the nearest large galaxy to our own, M31, also known as Andromeda, has eaten many small neighbors. Our first insight into the nature of these events is useful because Andromeda and the Milky Way are on course to meet. That's 4 billion years away, but it's good to be prepared. Dr. Dougal Mackey  of the Australian National University and  Professor Geraint Lewis  from the University of Sydney analyzed streams of stars within Andromeda's halo and identified some as the remnants of galaxies, even gaining approximations of when this occurred. Rather than a steady process, they identified two bursts separated by billions of years. The galaxies in the two r...