Assessment of rare 'teenage' planetary system deepens understanding of cosmic evolution

Planetary systems such as our solar system take hundreds of millions of years to evolve. Since humanity has only existed for a sliver of that time, astronomers have only observed planetary systems at ...

A rare six-planet alignment is lighting up the sky this week. Here’s how to see it.

Step outside just after sunset and you may catch an unusual sight: six planets strung across the sky in a gentle arc. The ...