Is there an unknown, massive planet on the fringes of our solar system? New work that claims to remove observational bias also supports this very exciting possibility.
The Summer Triangle isn't a constellation. It's a large asterism, or noticeable star pattern. But Vulpecula, Delphinus and Sagitta are officially recognized as constellations.
Neeti Kamthekar captured this photo of the lone sunspot that's been making its way across the sun in recent days. Looking at the sun - or aiming a camera its way - can be dangerous. We offer a link to some techniques for trying it, but always use extreme caution.
