The cause of the strange blue spiral is actually a SpaceX Falcon 9 rocket that blasted off from Space Launch Complex 40 ...
A spiral in the sky caused a buzz over Britain and much of Europe on Monday. For some skywatchers, it looked briefly like it might be evidence of alien activity. But it was only Elon Musk's company ...
A light year is nearly 6 trillion miles. This photo provided by the European Space Agency shows galaxies and clusters ...