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

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event ...

the closest point in the body's orbit to the sun. (The point at the end of the apsis is the aphelion). For some bodies, like all of the planets of the solar system, the difference between the ...

Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

This month offers incredible views of six planets, including Venus-Saturn conjunction. See the dates for all of 2025's ...

That puts it only slightly farther than Mars' current orbit of 1.5 AU from the sun. The simulations show that just one substellar object flyby was sufficient to alter the giant planets' trajectories.

Stargazers will be treated to a dazzling six-planet "alignment" this January.

Six planets are parading across the sky, appearing as some of the night's brightest stars. A few easy tips can help you ...

Witness a rare celestial spectacle! Seven planets, including Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune, will ...

A rare celestial event where seven planets align is visible in the UK skies. Discover how, when, and where you can observe ...