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

NASA's James Webb Space Telescope has been used to shed new light on the exoplanet, GJ 1214 b, which is more than eight times ...

Here’s how it works. A planet-size object that possibly once visited the solar system may have permanently changed our cosmic neighborhood by warping the orbits of the four outer planets ...

Indian scientists from the Physical Research Laboratory have discovered a massive exoplanet, TOI-6038A b, 78 times larger ...

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

This runaway growth led to the formation of the gas and ice giants in the outer solar system. This first-order model of planetary growth in the solar nebula is mainly driven by temperature and ...

These embryos, somewhere between small planetesimals and fully formed planets, were abundant during the solar system's formative ... but the size of the [parent body] is disputed." ...

For the first time, astronomers have imaged dozens of belts around nearby stars where comets and tiny pebbles within them are ...