Scientists have just discovered a tiny planet, a little planet, the li'lest planet, warm as toast, smaller than most, with a hot, rocky coast, circling a star far, far away.

Welcome to "Hey, Science," our disgustingly scientific weekly feature in which we will have your most provocative scientific questions answered by real live scientists (or related experts). No question is too smart for us to tackle, theoretically speaking. This week, experts address a Gawker reader's plea: When can we…

Scientists today have discovered a planet in a nearby solar system that is twice the size of planet Earth, made almost entirely out of diamond, and not at all useful to you or me.

Perhaps because they still feel bad about taking away Pluto's official planet privileges in 2006, scientists using the Hubble Telescope discovered a fifth moon orbiting the former 9th planet. The moon, creatively titled S/2012 (134340) 1, or P5, is irregular in shape and roughly 6-15 miles across.

Guys! Twinsies! NASA scientists have discovered the most earth-like planet yet, Kepler 22-b, and we are ready to move any minute now:

Reverse magnets! Dog robot! Cramped fish! Hair story! Cell swallowing! Cool science! Space storm! Fake planets! And studying abuse reveals that everything she said was true! It's your Friday Science Watch, where we watch science—with soul!

Astronomers have identified 54 new exoplanets in the "habitable zone" of their solar systems—meaning they could potentially sustain life as we know it. But we won't be able to live on any of them! Here's why:

Astronomers have discovered a possibly Earth-like—and therefore possibly liveable—planet in a star system 20 light years away, which is pretty close, in galactic terms. But can we all move to that planet when we've finished destroying this one?

[That's Janus and Prometheus, two of Saturn's moons, passing through the planet's rings. The pic was taken by the Cassini orbiter, which is currently just illing near Saturn. Via Bad Astronomy.]

According to the Hubble Space Telescope, there is a planet, with the unbelievably cool name of Wasp-12b, currently being "eaten" by a star. It only has 10 million years left, so enjoy it while it lasts. [BBC; pic via NASA]

Scientists found five new planets! Two hot planets, two even hotter planets, and "a planet with the density of Styrofoam." No aliens though :(. Well, keep looking, guys. [WP. Pic via]

Looking at the night sky in Florida last week, I remarked at a tall radio tower's two steady lights. My mom informed me that they were, in fact, the planets Jupiter and Venus (and that I was an idiot), brightly shining in conjunction for the first time in three years, and the last time for the next five. Our tech…