How do we draw alien planets? With every big exoplanet discovery comes a stunning artist’s rendition of a new world. Are these images realistic?

The planet, named Kepler-37b, orbits its star in a mere 13 days. 3-D Pen: A new pen called the "3Doodler" will allow you to draw in 3-D. The $75 gadget is basically a 3-D printer in the form of a pen.