For decades, Pluto was celebrated as the ninth planet of our solar system. However, in 2006, the International Astronomical Union (IAU) redefined what constitutes a planet, leading to Pluto’s ...

According to NASA, multi-planet lineups are visible "every few years," but a seven-planet alignment is particularly uncommon, as each planet's orbit varies, with some moving more quickly and Mercury, ...

Brown’s team discovered a dwarf planet, Eris, in January 2005. At the time, it appeared to be larger than Pluto. If Pluto hadn’t been demoted, Brown says, hundreds of celestial objects would ...

Six planets are visible in the night sky right now. On Feb. 28, Mercury will add a seventh planet to the planetary parade. Venus, Mars and Jupiter are 'great naked-eye targets' for beginning ...

the Moon is spending its final hours at a friendly aspect to the dwarf planet Eris, the warrior princess of the cosmos there. This time as a fully evolved Full Moon and with the asteroid Juno ...

And it’s as a dwarf planet that Pluto is taught to students today ... Allow little Pluto to keep its planetary status and you would have to confer the same honor on Eris, a Kuiper Belt object of about ...

And it’s as a dwarf planet that Pluto is taught to students ... status and you would have to confer the same honor on Eris, a Kuiper Belt object of about the same size, as well as any other ...

It has a ring and a small moon called Weywot. Pluto is a dwarf planet in the Kuiper Belt, a region of our solar system past Neptune. NASA captured stunning image of Eris dwarf planet. It is a dwarf ...

George Hampton Middle School student Vincent Chu of Woodbridge won the Prince William Regional Spelling Bee on Tuesday night ...