Oh, we humans do love a cleanly defined boundary, don’t we? They make things easier, after all. If we’re trying to categorize something, knowing what labeled bin to put it in is handy. If we’re ...

"These objects really could be anywhere in the solar system at any given time." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. One million alien ...

There are quite a few other places we might find life in the solar system, including dwarf planets like Ceres. Ceres is ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Astronomers have discovered two new exoplanets that are similar to other worlds found in the ...