740K views · 13K reactions | This incredible animation created by Dr James O'Donoghue puts objects in our solar system to scale in size, rotation speed and axial tilt. Science is so darn cool! | Ed Piotrowski WPDE | Facebook

37K views · 3.7K reactions | Our galaxy contains billions of other planets, but we know little about them. If we had the chance to study an exoplanet in greater detail, we could learn more about planetary evolution and habitability. Surprisingly, there is a nearby planet we could study that would not only teach us about our planet, but also about many exoplanets. | NASA Solar System Exploration | Facebook