2020年2月25日 · How to understand Einstein’s theory of gravity. What’s the maximum gravity we could survive? How many exoplanets are there in the universe?

2025年1月14日 · 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.

Is there gravity in space? - BBC Sky at Night Magazine

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 · So gravity may be everywhere in space, but that won't stop astronauts orothers from describing the wonderful feeling of weightlessness. Sometimes theillusion of human experience speaks volumes...

Gravity is most accurately described by the general theory of relativity, proposed by Albert Einstein in 1915, which describes gravity not as a force, but as the curvature of spacetime, caused by the uneven distribution of mass, and causing masses to move along geodesic lines.

Their gravity distorts the structure of spacetime, magnifying light from more distant objects. This effect, known as strong gravitational lensing, allows astronomers to study galaxies that would ordinarily be too far to see, map the distribution of mass in the galaxies doing the lensing, and measure the expansion rate of the universe.

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.

2023年7月30日 · To summarize, according to Einstein, gravity is the curving of spacetime by all the objects in it, combined with the "geodesic" (straight) motions of those objects through the...

2020年2月16日 · Gravity does weaken with distance. But for massive objects like stars and planets, their gravitational reach is enormous. Without Earth’s gravity, the Moon (which orbits roughly a thousand times farther away than the International Space Station) would fly off into the depths of space.