The Hubble tension is one of the most hotly debated discrepancies in all of astronomy. It centers around a number called the Hubble constant, which is functionally the rate at which our universe is ...

It centers around the Hubble constant—the measurement of how fast our universe is expanding—which comes out as two different numbers when calculated two different ways, even though those ...

In this model, the anti-universe stretches backward in time from the Big Bang, mirroring the properties of our Universe with reversed spatial configurations and dominated by antimatter.

From mysterious dark matter to the radioactive decay of atomic nuclei, the past 12 months have reiterated just how strange ...

Part 1 gives a brief outline of the general structure of the universe and Part 2 deals with the solar system, concluding with a short account of the origin of the sun and planets. Reference is ...

The universe doesn't have an outer perimeter, and nothing exists outside it, because there isn't an outside. As an analogy, consider the shape of our galaxy, the Milky Way. We can infer that it is ...

Astronomers know that the universe is being pushed apart at an accelerating rate and they have puzzled for decades over what could possibly be speeding everything up. They theorize that a powerful ...