NASA

NASA @NASA

@Ken83867002 The spherical shape of planets and large moons is caused by gravity. They are so massive that their gravity shapes them into spheres. Smaller moons, like Mars’ Phobos and Deimos, don’t have enough gravity to create a spherical shape, leaving them oblong and irregular. — PolitiTweet.org

NASA @NASA

@1000_FacedHero We’ll use data collected from the satellite to help people monitor freshwater resources and provide communities with accurate information so that they can prepare for the consequences of a changing climate. Check out our video overview: https://t.co/vc8QTCb6kp — PolitiTweet.org