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Stunning array of 400 rings in a 'reflection' nebula solves a 30-year-old star-formation mystery — Space photo of the week

The discovery is the first direct observational confirmation of a theory for how young stars feed on, and then explosively ...

Curiosity corner: Why do we see our reflection in water?

Discover the science behind seeing your reflection in water. Light travels in straight lines and bounces off smooth surfaces, ...