A compound lens forged by two galaxies is helping astronomers get a bead on the Hubble Constant and dark energy.

The Chandra X-ray Observatory is the darling of high-energy astrophysics. Famed for providing unequaled x-ray views of ...

For spinning spheres, centrifugal force is maximized at the equator, where the rotational speed is highest. The amount of the ...

When we go backwards in time through the history of the cosmos, the distances and volumes shrink, while the average energy ...

Our knowledge of physics — gained through astrophysical experiments, or in laboratories via machines such as particle ...

For example: The total debt of the United States government surpassed $31 trillion in 2022. There are an estimated 100 ...

The Big Bang theory suggests that the universe began as a hot, dense point, expanding into the cosmos we observe today.

Astronomers have discovered a massive, nearly perfect ring of galaxies, 1.3 billion light-years in diameter, that defies ...

The CMB provides a window into the hot, dense conditions at the beginning of the universe. Penzias and ... but its consequences are observable today. Observations by astronomers have provided ...

But the size is just one of the problems ... "We could expect maybe one exceedingly large structure in all our observable Universe. Yet, the Big Ring and the Giant Arc are two huge structures and are ...

Our most powerful telescopes have revealed that the cosmos is surprisingly simple on the largest visible scales. Likewise, ...