A rare alignment of two exoplanets with their star, marking one of the few known exosyzygies, an astronomical event involving ...

Most planetary systems contain worlds larger than Earth but smaller than Neptune, and the low-density planets around one ...

Polar dunes on Mars, swirling clouds on Jupiter, and stunning sights in the night sky on Earth are featured this week. Plus, ...

Mars, often depicted as a barren red planet, is far from lifeless. With its thin atmosphere and dusty surface, it is an ...

The Planetary Science and Astrobiology Decadal Survey 2023-2032 will assess key scientific questions in planetary science and astrobiology, identify priority medium- and large-class missions and other ...

If you missed May’s Northern Lights, another celestial event will occur next week called the “planetary parade,” where several planets will appear to be in a straight line from Earth, though only two ...

Planetary nebulae are colorful clouds of gas from dying stars. Brighter nebulae show more color due to intense light. Many planetary nebulae are visible even from suburban areas. Larger telescopes ...