Is a sun a star or a planet? While science now agrees the sun is a star, new telescopes may soon challenge how we define ...

Planetary scientist Adeene Denton runs computer simulations to investigate Pluto, the moons of Saturn and other icy bodies in the solar system.

Pluto’s thin, blue haze glows in this image from NASA’s New Horizons spacecraft. Though the dwarf planet is just a faint speck through a telescope, opposition this month offers skywatchers their best ...

The tides of change are as potent as ever, pushing us into uncharted territory while clearing space for something entirely new. On Oct. 13, Pluto will station direct in Aquarius, after a retrograde ...

From May 1 to October 11 of 2024, Pluto will be retrograde in Capricorn and Aquarius. Here’s what it means for your sun sign.

Think you can spot Pluto? On July 25, the famously elusive dwarf planet reaches opposition—its best and brightest moment of the year. That makes now the ideal time to try to catch a glimpse of it from ...