Every day NASA posts a new astronomy related picture to their site. I am going to bring them to you in case you forget.
Today’s image is titled A Laser Strike At The Galactic Center.
Explanation: Why are these people shooting a powerful laser into the center of our Galaxy? Fortunately, this is not meant to be the first step in a Galacticwar. Rather, astronomers at the Very Large Telescope (VLT) site in Chile are trying to measure the distortions of Earth’s ever changing atmosphere. Constant imaging of high-altitude atoms excited by the laser — which appear like an artificial star — allow astronomers to instantly measure atmospheric blurring. This information is fed back to a VLT telescope mirror which is then slightly deformed to minimize this blurring. In this case, a VLT was observingour Galaxy’s center, and so Earth’s atmospheric blurring in that direction was needed. As for inter-galaxy warfare, when viewed from our Galaxy’s center, no casualties are expected. In fact, the light from thispowerful laser would combine with light from our Sun to together appear only as bright as a faint and distant star.