10 Tiniest Planet Earlier this year, the Kepler Observatory discovered a star system with three planets, including the smallest expolanet found to date. The Kepler telescope is conveniently located in space, allowing it an unobstructed view to the stars without that pesky atmosphere thing in the way. Dubbed Kepler 37-b, this baby planet is smaller than Mercury and only about 200 kilometers (124 mi) larger in diameter than our own Moon. Unfortunately, it’s also sitting uncomfortably close to the threshold that saw Pluto demoted from full-time planet. 9 The Milky Way’s Fermi Bubbles The Milky Way galaxy looks absolutely immense when viewed flat, as we’re accustomed to seeing it in illustrations. When viewed edge-on, however, it’s underwhelmingly wispy and scrawny looking. Or at least it was, until we looked at it in the extremely short end of the spectrum: X-rays and gamma rays. The Fermi Bubbles jut out perpendicularly to our galaxy’s disc and encompass a length of 50,00
by Gerard de Vicente
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