That allows for time differences and time zones, specifically ones that are larger than 12 hours. Similarly, you can see the light coming out of a spotlight on a stage in the theater, even though you—the crowd—are sitting in the dark. The force of attraction gravity between two objects depends on their mass and the distance between them.
Simply said, gravity will pull toward the center of mass of the objects. To find the center of mass, you have to examine the object. Consider a sphere. Since a sphere has a consistent shape, no matter where on it you stand, you have exactly the same amount of sphere under you. Imagine an ant walking around on a crystal ball.
This will occur no matter where on the surface the object is located. Consider a flat plane. The center of mass of a flat plane is in its center, so the force of gravity will pull anything on the surface toward the middle of the plane.
I am quite positive that, even for Australians, an apple falls downwards, not sideways. For further reading about the center of mass and distribution of mass, check out this link. Some of them got back, some of them still float through the solar system and almost beyond it , and many transmit amazing images to our receivers on Earth. In all of these photos, the Earth is wait for it spherical. So if you're on the right commercial flight, you might be able to see the curvature of the earth with your own two eyes.
In the event that you're not high enough, though, you can still experience the curvature of the earth another way. For example, if you were to fly all the way around the world, you'd find that it would be nighttime in part of the world and daytime in another part. In that way, the existence of time zones itself is proof that the Earth is round. Taken another way, you wouldn't even need to travel through different time zones.
According to the Farmers' Almanac , the sun will rise and set roughly four minutes later for every 70 miles you drive from east to west. If you wanted to combine this experiment with the previous one, you could note how much more of Earth you can see when you begin your ascent into the air than you can while you are sitting on the tarmac waiting to take off.
Pick a nice spot from which you can watch a sunset we'll call this point A. Ideally, you'd have a clear horizon in front of you, and behind you would be some sort of elevated point that you can quickly access a hill, a building with at least two floors, or perhaps the aforementioned tree; we'll call this point B. Watch the sunset from point A, and once the sun is out of sight, hurry on over to point B. With the added elevation provided by point B, you should be able to see the sun above the horizon.
If Earth were flat, the sun would not be visible at any elevation once it had set. Because Earth is round, the sun will come back into your line of sight. If you don't have a hill, you could even try lying on your stomach to watch the sunset and then standing up to get a higher line of sight. Pick two locations that are some distance apart at least a couple hundred miles from each other and on the same meridian. Grab two sticks or dowels or other objects of equal length, two tape measures, and a friend.
For accuracy, you should both take your measurements at the same time of day. On a flat Earth, the shadow that is cast by each would be of the same length. However, if you and your friend compare notes, you'll find that one shadow was longer than the other.
Uranus is 2. Neptune is 1. They're not perfectly round, but they're pretty close. Do you want to know what it's like to be a spinning planet? You can feel it when you spin around in place. First, make sure there are no obstacles around that you might bump into. Then either while standing, or in a spinner chair, spin around in circles. Hold your arms close to your body, then extend your arms out. Move your arms in and out and feel the difference. When your arms are outstretched, your hands have to move faster than your shoulders to keep up, so you'll feel more force on them.
Why Are Planets Round? The Short Answer:. A planet is round because of gravity. Feel the forces from spinning Do you want to know what it's like to be a spinning planet?
TWO: I can't wait. I love pyramids. They're straight to the point. FOUR: How about a sphere? ONE: A sphere. FOUR: Yeah, a round sphere. ONE: Hmm, I like it. And that my dear BTN viewers is not the reason why the Earth is round. ONE: Shhh. ONE: Irregularly shaped ellipsoid FOUR: What? I still think it makes sense for it to be flat.
ONE: Sure, sure, sure and what happens when you reach the edge? Do you just fall off? TWO: A pyramid. ONE: Round.
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