6 天之前 · The answer is gravity: an invisible force that pulls objects toward each other. Earth's gravity is what keeps you on the ground and what makes things fall. An animation of gravity at work. Albert Einstein described gravity as a curve in space that wraps around an object—such as a star or a planet.

In physics, gravity (from Latin gravitas ' weight ' [1]) is a fundamental interaction primarily observed as a mutual attraction between all things that have mass.Gravity is, by far, the weakest of the four fundamental interactions, approximately 10 38 times weaker than the strong interaction, 10 36 times weaker than the electromagnetic force, and 10 29 times weaker than the weak interaction.

2023年7月30日 · Gravity is one of the universe's fundamental forces and dominates every moment of our conscious experience. It keeps us close to the ground, drags baseballs and basketballs out of the air and...

2016年3月2日 · It is here that Einstein connected the dots to suggest that gravity is the warping of space and time. Gravity is the curvature of the universe, caused by massive bodies, which determines the path that objects travel.

Our modern understanding of gravity comes from Albert Einstein’s theory of general relativity, which stands as one of the best-tested theories in science. General relativity predicted many phenomena years before they were observed, including black holes , gravitational waves , gravitational lensing , the expansion of the universe , and the ...

2025年1月16日 · The Key to Space Flight. Basically all of space flight involves the following concept, whether orbiting a planet or travelling among the planets while orbiting the Sun. As you watch the third cartoon's animation, imagine that the cannon has been packed with still more gunpowder, sending the cannonball out a little faster.

2020年2月25日 · Gravity is everywhere, even in space. The space between the solar system’s planets might seem empty, but the Sun’s gravity tethers them to their orbits. A quick YouTube search reveals a...

2024年10月29日 · General relativity is physicist Albert Einstein's understanding of how gravity affects the fabric of space-time. The theory, which Einstein published in 1915, expanded the theory of special...

2018年1月28日 · The short answer is "yes"—there is gravity in space. Look back at the gravitational equation above. What changes in that equation as you move from the surface of the Earth into space?

2009年7月27日 · Gravity represents the mutual attraction between two objects, and thestrength of that pull depends on both mass and the distance between theobjects. Greater mass leads to a greater...