However, astronomers now say that the effect of ordinary matter, which makes up only 16 percent of all matter in the Universe, and neutrinos, tiny particles that rarely interact with normal matter, ...

A systematic search for the first bright galaxies to form in the early universe has revealed a dramatic jump in the number of such galaxies around 13 billion years ago. These observations of the ...

A projection through a 130 million light years thick slice through a simulation of a cubic volume of 9,132 million light years on a side. The luminosity of the background image gives the cold dark ...

The plot represents the new model with the x-axis and the y-axis showing the minimum sizes of collapsing and expanding regions that can impact cosmological measurements. The contours are independent ...

Physicists who work with a concept called string theory envision our universe as an eerie place with at least nine spatial dimensions, six of them hidden from us, perhaps curled up in some way so they ...

Astronomers tallying up all the normal matter—stars, galaxies and gas—in the universe today have come up embarrassingly short of the total matter produced in the Big Bang 13.6 billion years ago. In ...

NASA and the European Space Agency have released an image captured by the Hubble Space Telescope of a dwarf irregular galaxy that they admit looked "unexciting" at first glance. However, there's more ...