"Cosmologists calculate the current theoretical size limit of structures to be 1.2 billion light-years, yet both of these structures are much larger – the Giant Arc is almost three times bigger and ...

Galaxies speckle the heavens like stars in a stunning new photo of the deep and distant universe.

Hubble’s 35-year journey showcases humanity’s boldest space achievements, capturing everything from new stars forming to ...

In the summer of 1995, Robert Williams, then director of the Space Telescope Science Institute, which manages the Hubble ...

A new University of Kansas survey of distant galaxies using the James Webb Space Telescope reveals never-before-seen star ...

Astronomers have detected drifting water clouds in deep space, far from any planet or star. This discovery strengthens the ...

Prebiotic molecules central to life's earliest metabolic processes—chemical reactions in cells that change food into ...

Neutron stars are some of the weirdest cosmic objects, and the greatest mysteries lie deep in their hearts.

It is a small area of the sky, equivalent to holding a square of one millimeter by one millimeter at arm’s length. But tens ...

The potential finds could be contributing to some of the faintest light we can see in the universe, say researchers.

A brilliant flash from deep space once baffled scientists. But now, that mystery has been solved—and it reshapes what we know ...

Physicist Richard Lieu first explored the idea that gravity could exist without mass—now he’s got a new cosmological model ...