Most orbits are not perfectly circular so the word 'falling' is a bit inaccurate because, in an elliptical orbit, the shell would be climbing sometimes and falling at other times. It still never actually gets to the ground. In all cases, the experience if you were on board the shell woul...
•The revolution of the Earth and other planets around the sun may be treated as circular for simplicity, but planetary orbits are actually elliptical (slightly oval) and therefore not an example of rotational motion. An object can be rotating while also experiencing linear motion; just consider...
It has do with the time when stars and planets are formed. They form due to the collapse of humongous clouds of gas and dust. The materials present in the clouds, and the clouds themselves, were in motion due to the aggregate gravity of the galaxy. So, when seen from the center of t...
Since the Earth orbits the sun in the same direction that it rotates, when it's morning (6 am) you're standing on the "front side" of the Earth. But once the ball gets rolling (so to speak) you find yourself with a solar system full of big rocks onslightlydifferent orbits slamming ...
Why do planets revolve around the sun? Why doesn't Venus have a magnetic field? Why are there no moons that orbit Mercury and Venus? Why is Venus the brightest planet? Why will Polaris not always be the North Star? Why does Venus have the highest surface temperatur...
Why Do Stars Seem To Have 5 Points (Corners)? The Way Stars Appear To Us It’s pretty straightforward, isn’t it? Humans draw stars, and everything else, precisely the way they appear to them. Now, it’s true that stars do appear pointy, with a few extended arms when we look...
In other galaxies, however, the motions of stars have a greater degree of randomness, with their orbits adopting a wide variety of velocities and angles relative to the plane of their galaxy. In elliptical galaxies, this is often easy to explain: It's the result of a major galaxy merger ...
In fact, it is the centripetal force provided by the gravitational force of the sun that keeps the planets in their orbits. If the centripetal force is not strong enough, the planet will either crash into the sun or drift away into space. The balance between the gravitational force and th...
the 23.5 degree tilt of the planet’s axis. As a planet or other body orbits its parent star, it does so in an oblong, or elliptical path. This means that instead of going around in a perfect circle, the orbit itself is elongated at either end. As a result, the Earth drifts from ...
the creation and development of calculus was required. All of them made use of the fundamental tools and items at their disposal to achieve this, but would not have been successful without the one crucial tool - knowledge of mathematics. Mathematics is a language - the language of science and...