Why does the moon’s gravity cause tides on earth but the sun’s gravity doesn’t?

The earth’s ocean tides are not just caused by the moon’s gravitational pull, they are actually also caused by the sun’s gravity too. We are led to believe that it is just the moon, but this is not the case.How strong does gravity have to be to affect the tides?The tides on earth are not … Read more Why does the moon’s gravity cause tides on earth but the sun’s gravity doesn’t?

Why did people believe earth is the center of the solar system when it’s obvious the sun is?

To start with: the sun is not the center point of solar system. But the answer is more complicated than that. First, we have to define the center of our solar system, then we need to investigate why people believed the earth was the center instead of the ‘obvious’ answer of the sun, which is … Read more Why did people believe earth is the center of the solar system when it’s obvious the sun is?

What would happen if you drove your car close to the speed of light and turned on the headlights?

What is the speed of light?The speed of light in a vacuum always travels at exactly 299, 792, 458 meters per second. This is the unit c in equations. This is the case from the moment of its creation, light does not need to accelerate to this speed, it is already going this speed from … Read more What would happen if you drove your car close to the speed of light and turned on the headlights?

What makes the Great Wall of China the only man-made object visible from space?

Although the question suggests that it is a fact that the Great Wall of China is visible from space, it actually is not visible to the naked eye from space.  According to NASA themselves, the Great Wall of China is not even visible to the naked eye when in low-earth orbit. Yes, the Great Wall … Read more What makes the Great Wall of China the only man-made object visible from space?

What is the strongest magnetic field possible? Is there a limit?

The short answer is that there is no set limit that is rigid for a magnetic field strength. But some interesting things will start to happen when magnetic fields reach a high strength.How does a magnetic field work?A magnetic field will act in a way that exerts its force sideways onto a moving electric charge. … Read more What is the strongest magnetic field possible? Is there a limit?