What does it mean to say spacetime is curved?

Curved space often refers to a spatial geometry which is not “flat”, where a flat space is described by Euclidean geometry. Curved spaces play an essential role in general relativity, where gravity is often visualized as curved space.

Why is space curved?

Gravity is the curvature of the universe, caused by massive bodies, which determines the path that objects travel. That curvature is dynamical, moving as those objects move. In Einstein’s view of the world, gravity is the curvature of spacetime caused by massive objects.

Is space the 4th Dimension?

Space is indeed curved — in four dimensions. Many people think the fourth dimension is simply time, and for some astronomical equations, it is. Einstein used time as a fourth dimension to describe a coordinate system called space-time.

Do humans bend space?

Large objects such as the Sun and planets aren’t the only masses that warp the fabric of space-time. Anything with mass—including your body—bends this four-dimensional cosmic grid.

How does gravity warp space?

Gravity, Einstein asserted, is caused by a warping of space and time—or, in a language we physicists prefer, by a warping of spacetime. The Earth’s matter produces the warpage, and that warpage in turn is manifest by gravity’s inward tug, toward the Earth’s center.

What do scientists mean when they say space is curved?

What do scientists mean when they say space is curved? Space is indeed curved — in four dimensions. Many people think the fourth dimension is simply time, and for some astronomical equations, it is. Einstein used time as a fourth dimension to describe a coordinate system called space-time.

How can I imagine space curved in four dimensions?

To assist you in imagining space curved in four dimensions, pay a visit to Flatland, a two-dimensional world full of square, triangular, and circular beings. If it helps, draw Flatland and its residents on a sheet of paper and place it flat on a table in front of you.

What is the fourth dimension of space?

Many people think the fourth dimension is simply time, and for some astronomical equations, it is. Einstein used time as a fourth dimension to describe a coordinate system called space-time. This is the stage on which planets, stars, galaxies — all matter in the universe — act their gravitational roles.

Can a 3-dimensional being move up and down in space?

The laws of 2D space as understood by 2D beings would restrict light (and everything else) from moving up and down; in fact, there would be no up or down. So as a three-dimensional being, your actions would violate the Flatlanders’ laws of physics.