On hearing the word sky, a blue sheet appears in front of the eyes. But have you ever wondered why the sky is blue? And when ...

A brand new NASA space observatory, SPHEREx, has taken its first test images a few weeks after its launch on March 11, and all indications are looking good for it to take wide and gorgeous views of ...

On a clear, sunny day, the sky above us often glows a brilliant ... of all the colors of the rainbow. Each color corresponds to light waves of different lengths—red waves are long and lazy ...