April’s planetary parade has fewer planets. Only four will line up: Venus, Saturn, Mercury and Neptune. April's parade of ...

Details such as how long it takes the planet to complete an orbit and how much light it blocks as it passes in front of the star offer clues to its size and orbit. Astronomers can make a few ...

Large planets need metal-rich stars in order to form; small planets do not ... to the formation of a terrestrial planet about the size and mass of Earth. But if a large planetary core around ...

Large planets need metal-rich stars in order to form; small planets do not ... Larger planets beyond the size of Neptune are ...

The biggest stories of the day delivered to your inbox.

The Webb telescope has spotted exoplanets circling white dwarf stars, proving that planets can survive their star’s violent ...

concentrated on understanding the intricate dynamics leading to the reduction in size of specific sub-Neptune planets. Christiansen's team suggested a compelling link between the cores of select ...

"What we found is that right around the size of Neptune, planets go from being almost always on circular orbits to very often having elliptical orbits," team leader and UCLA researcher Gregory ...