Way back in the year 775, it looks likely that the Earth was slammed with a massive burst of gamma rays, briefly soaking the planet in quite a bit of radiation. This radiation spike was measured by studying tree rings in Japan and rocks in Antarctica, pinpointing it to 775, the year when Baghdad was the world’s biggest city.
Scientists have finally been able to detect a gravity wave moving through space and time, just as Einstein predicted.
There are plenty of binary star systems out there, but it’s often been thought that there’s an absolute minimum distance two starts can orbit each other before they just slam into each other and form a single star. But several pairs of new red dwarf stars are challenging that minimum distance.