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

Astronomers may have discovered a scrawny star bolting through the middle of our galaxy with a planet in tow. If confirmed, ...

New findings offer clues about the ancient origins of asteroids and their potential role in the formation of terrestrial ...

A planet parade is when several of our solar system's planets are visible in the night sky at the same time. There will be six planets visible this time around, including Venus, Mars, Jupiter ...

While this parade of planets look to our eyes to be huddled in the evening sky, they are of course spread out across a vast chasm of space across the solar system, separated from each other by ...

An event called a "ring plane crossing" will occur between Saturn and Earth on March 23, 2025, when Saturn's rings will ...

Mercury takes only 88 Earth days to orbit the sun.

New research shows that star activity can distort exoplanet measurements, affecting size, temperature, and atmosphere ...

Temperamental' stars that brighten and dim over a matter of hours or days may be distorting our view of thousands of distant ...

To better understand why the planets have variable compositions ... to the formation of the gas and ice giants in the outer solar system. This first-order model of planetary growth in the solar ...

These embryos, somewhere between small planetesimals and fully formed planets, were abundant during the solar system's formative ... in the earliest days of our cosmic neighborhood.

Most of the information we have about planets beyond our solar system (exoplanets) comes from looking at dips in starlight as these planets pass in front of their host star. This technique can ...