NEW YORK (AP) — Six planets are linking up in the sky at the end of February, and most will be visible to the naked eye. It’s ...

Planetary systems in the Milky Way galaxy tend to follow a particular pattern: rocky planets toward the center, closest to ...

A rocky exoplanet in the LHS 1903 system defies planet formation models, hinting that gravitational upheaval reshaped the red dwarf’s four worlds.

An international team of astronomers has discovered a distant planetary system that challenges long-standing theories of how planets form. Across our galaxy, astronomers routinely observe a ...

About 4.6 billion years ago, a celestial cloud collapsed, paving the way for our solar system to form. Then, a nebula with strong gravitational pull took shape, kick-starting the birth of the sun. But ...

Mark your calendars for the last week of February, because one of the coolest celestial events is coming up where six planets will be visible in the night sky at the same time. This phenomenon, known ...

Astronomers have uncovered a distant planetary system that flips a long-standing rule of planet formation on its head. Around the small red dwarf star LHS 1903, scientists expected to find rocky ...

Scientists have observed a “rogue planet” that is growing at an alarming rate as it gobbles up six billion tons of gas and dust every second, a new paper revealed. The newly studied object, formally ...

A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth than the hypothetical Planet X, which astronomers have been hunting for ...

The Panel on Giant Planet Systems is one of six panels providing topical input to the Planetary Science and Astrobiology Decadal Survey Steering Group. This panel will discuss the role played by ...