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 ...

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 ...

The article describes planetary nebulae, the glowing shells of gas expelled by dying stars, their formation resulting from the exhaustion of a star's hydrogen fuel and subsequent gravitational ...

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 ...