AsterismXray

There used to be an application for Mac OS called M-13. It allowed you to see constellations in a similar way to AsterismXray. It long ago disappeared and we couldn't find the name of the original Author anywhere. So we created what we believe is a better (more complete) application. It is very useful for demonstrating to people why constellations aren't really that important. The patterns fall apart quickly with small perspective changes. And it is fun to use! Enjoy! Stars that look side by side in a constellation are often hundreds or thousands of light years apart. AsterismXray lets you see that for yourself. Pick any of the 88 IAU constellations, Ptolemy's 48 classical constellations (including the historic Argo Navis) or 25 popular asterisms such as the Big Dipper, the Summer Triangle and the Southern Cross. Then orbit around Earth and the figure in 3-D, with a coloured ray running…