When the International Astronomical Union (IAU) demoted Pluto from a planet to a dwarf planet in 2006, it surprised a lot of people, including some scientists. Even many years later, some ...

In astronomy, what does retrograde mean? And what connection does it have to astrology? We explain how planets move across ...

Identifying asteroids on a potential collision course with Earth could be made easier thanks to an advancement in how to ...

But unlike its dwarf planet cousin Pluto — which New Horizons promoted ... that would not agree with our model." This research is described in a paper published Nov. 15 in the journal Science ...

For one reason or another, some people are still upset about Pluto's demotion from planet to dwarf planet. This demotion, by the way, occurred all the way back in 2006. So, what does famed ...

Planitia structure on its surface. Ever since NASA's New Horizons sent back the first-ever photos of Pluto in 2015, the dwarf planet's mysterious heart-shaped region has puzzled scientists.

Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute When the International Astronomical Union (IAU) demoted Pluto from a planet to a dwarf planet in 2006 ...