Patrick’s Day usually conjures images of partying, Catholicism, Irish nationalism and, perhaps most famously, the color green ... more likely to see the color blue. In fact, there’s even ...

You can now submit your photo featuring red, green and blue to our April editor's challenge for a chance to be featured on ...

On left, this composite simulated image shows how M87* is seen by the Event Horizon Telescope at 86 GHz (red), 230 GHz (green), and 345 GHz (blue). On right, 345 GHz is seen in dark blue ...