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space-time

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Physics

Bizarre portal-like ‘ring wormholes’ could let you time travel

A ring wormhole is one that you could simply step through, like a portal through space – but new, more detailed models have shown that they could be a portal through time as well

News

CE8NB6 Illustration showing galaxy giant whirlpool in space galaxy's effect on space image shows how gravity galaxy warps local

Physics

To create a wormhole that doesn't collapse, you need exotic matter

Features

Across the universe. Traveling in space. Time travel. Elements of this image furnished by NASA.; Shutterstock ID 200832383; purchase_order: -; job: -; client: -; other: -

Space

Why general relativity is known as a background independent theory

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2F8Y7GF Spacetime Scifi Digital Arts concept, Twist clock time distortion warp on space bended curved as hole represent Space and Times of Einstein Theory

Physics

What does it mean when we say that space-time is expanding?

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What the thermodynamics of clocks tell us about the mysteries of time

Physics

What the thermodynamics of clocks tell us about the mysteries of time

Features

WHY does time only move forward?

Physics

Why does time only move forwards? Possibly just because we’re ignorant

Features

Did time flow in two directions from the big bang, making two futures?

Physics

Did time flow in two directions from the big bang, making two futures?

Features

Inside the incredibly slow race to reinvent time

Physics

Inside the incredibly slow race to reinvent time

Features

Gravity

Definition

Gravity

Why it's better to fall into a big black hole, and other bizarre facts

Space

Why it's better to fall into a big black hole, and other bizarre facts

Black holes exert a powerful pull on our imagination, but their weirdness starts way before you cross the event horizon, says astrophysicist Chris Impey

Features

Space

Astronomical time can help us put lockdown into perspective

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People in Science

Albert Einstein

Definition

General relativity

Definition

Second law of thermodynamics

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