5.3K views · 348 reactions | The sun itself rotates on its own axis slowly, once a month. The planets all revolve around the sun in the same direction and in virtually the same plane. In addition, they all revolve in the same general direction, with the exceptions of Venus and Uranus. Sun also revolve around thge SMBH at the galactic center of milkyway. So, we can imagine that the actual motion of planet around sun is helical , if seen from outside solar system. | Free AstroScience | Facebook

The missions of our New Frontiers Program are already unlocking the secrets of asteroids, Jupiter and the far reaches beyond Pluto. 🛰 Today we'll unveil the next expedition of exploration. Watch the announcement on NASA Science Live at 4pm ET on this page or http://go.nasa.gov/31ROsEh | NASA Solar System Exploration