Planet demographics reveal a puzzling lack of worlds in a certain size range throughout the galaxy F or centuries our solar system was the only planetary system known to humans. We had no proof other ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

For a brief moment at the end of February, every planet will appear in the night sky simultaneously in a rare celestial ...

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but with a telescope you can spot Neptune and Uranus.

Canadian astronomers have taken an extraordinary step in understanding how planets are born, using the James Webb Space ...

Four planets will be widely visible to the naked eye through part of February, but calling them a 'planetary alignment' may not be the full picture.

A planetary alignment, or a "planet parade" according to the internet, will grace our night sky just after dusk, according to EarthSky, a stargazing and astronomical website. We'll see six planets – ...

White dwarf stars could host habitable planets. Fast planetary rotation reduces cloud cover, keeping surface temperatures stable.

Have you heard of the “planetary parade” that’s happening in the night skies? For much of January and February, you have the chance to see six planets in our solar system after dark ...