NASA’s PUNCH mission just took a big step forward with the first images from its solar-observing instruments, revealing the outer atmosphere of the Sun like never before. As the four-satellite ...

However, that isn’t what scientists see. Instead, stars orbit at about the same speed regardless of their distance from the galactic center. You might see this referred to as the "Galaxy Rotation ...

When I was in grade school I was fascinated by the world’s largest telescope: the 200-inch-diameter Hale Reflector on Palomar Mountain near San Diego.

A camera affixed to the International Space Station recently spotted some curious symbols amid a barren desert landscape.