When you buy through links on our articles, Future and its syndication partners may earn a commission. A newly proposed mass-based definition of a planet classifies thousands of exoplanets across the ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Three astronomers last week proposed expanding the official definition of a planet to encompass ...

It still wouldn't include Pluto, unfortunately. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Three astronomers last week proposed expanding ...