Debate has raged for two decades over whether Pluto should be considered a planet. Some want President Trump to take action ...

NASA chief Jared Issacman appears to be among those who support Pluto being reclassified as a planet. Could President Trump sign an executive order?

New observations have ruled out the chances of an asteroid hitting the moon in 2032, according to scientists using the James Webb Space Telescope.

When NASA’s Dawn spacecraft arrived at Ceres in 2015, it revealed a dwarf planet far more complex than scientists expected.

As next-generation telescopes map this outer frontier, astronomers are bracing for discoveries that could reveal hidden planets, strange structures, and clues to the solar system’s chaotic youth. Out ...

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The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study suggests a potential new candidate, which the paper’s authors have dubbed ...

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More than 50 times further from the Sun than Earth, the tiny dwarf planet Makemake is one of the last places you'd expect to find an intact gaseous atmosphere. Not only is it incredibly cold, being ...

New research based on data from NASA’s Dawn mission suggests the dwarf planet Ceres may have once possessed a deep, long-lasting energy source capable of sustaining habitable conditions in its ancient ...

Dwarf planet Ceres is shown in these enhanced-color renderings that use images from NASA’s Dawn mission. Credit: NASA At first glance, the dwarf planet Ceres hardly inspires dreams of alien life.