It’s why no matter where you are on Earth, you weigh about the same amount! If it acts on everything a planet is made of, then all parts of the planet will have to be equidistant from the planet’s center. Gravity acts on everything equally–it doesn’t discriminate. So what happens when a potential planet is so massive it starts affecting itself? Well it’s a simple product of gravity. There’s more to it, but suffice to say that the centers of planets and stars are generally where most of the mass is concentrated. It’s also the reason the cores of planets and stars are hot–assuming they haven’t cooled down yet. Most of our celestial objects’ mass is concentrated at their centers–it’s why the cores of stars and planets are so dense. What Makes Things Round?Įventually, there’s a point where our space chunks’ gravity starts having a noticeable impact on themselves. But that’s a different story in space, wherein these large chunks can pull other chunks towards their centers. Of course, most objects on our scale are not anywhere near massive enough to create any meaningful pull. Alternatively, gases can freeze and form gas giants.īut as it turns out, everything has its own gravitational pull (even you!). This process continues until you get some really big chunks floating around. Those bigger chunks of space dust continue colliding with other chunks, eventually making like… Space pebbles or something. By chance, the space dust collides, and eventually makes bigger chunks of space dust. Normally this follows the formation of a star- it’s just the leftover stuff that was left unused. There’s a bunch of space dust and stuff floating around. Luckily, the way planets are formed is actually quite simple. Well… Most of the answer lies here, in honesty. Part of the answer has a lot to do with how planets are formed and the way gravity works. But what makes that work? Why exactly is the Earth round? How Planets Are Formed Those are intuitive arguments, but we also know that the Earth has to be round. We could go into the evidence, like how we’ve been to space, how you can see the curvature of the Earth on the horizon, and how you can loop around the Earth without falling off the edge. Why Is the Earth Round?Īlright, this question assumes you know the Earth is a sphere. (Last Updated On: May 11, 2020) Earthrise, taken on December 24, 1968, by Apollo 8 astronaut William Anders.
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