Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the discovery of Pluto in the 1930s. Labeled as planet X, prominent astronomers ...
Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. What is big, with a ...
On any given night, it's likely that knowledgeable stargazers will be able to spot at least one bright planet shining in the night sky. Because they don't happen every year, such cosmic displays tend ...
The debate over Pluto’s planetary status has been ongoing since its reclassification as a “dwarf planet” in 2006 by the International Astronomical Union (IAU). Recent discussions and new scientific ...
About ten years ago, science writer Ferris Jabr started contemplating Earth as a living planet rather than a planet with life on it. It began when he learned that the Amazon rainforest doesn't simply ...
A bright ring of dust circling a young star can look calm from far away. In reality, it may mark one of the messiest moments ...