Mercury is the closest planet to our Sun, but oddly enough, not the hottest. Since Mercury has no atmosphere, more of the Sun's heat radiates away from it whereas Venus, even though it's further away from the sun, has a thick greenhouse atmosphere trapping and retaining the Sun's heat and making it hotter.
A primitive ocean on #Mars held more water than #Earth’s #ArcticOcean, and covered a greater portion of the planet’s surface than the #AtlanticOcean does on Earth, according to new results published today. www.eso.org/public/
The solar system could be thrown into disaster when the sun dies if the mysterious 'Planet Nine' exists, according to new research.-- All right space nuts get the latest about "Planet Nine" in this interesting article.