The universe's missing matter may have finally been found. Astronomers think regular matter — that is, the stuff that isn't dark matter — makes up about 15% of the universe's total mass. However, for ...

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 ...

For millions of years following the Big Bang, after the universe’s roiling soup of particles had cooled, the cosmos was a dark and boring place. There were no stars to make light. No familiar swirls ...

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London.View full profile Alfredo has a PhD in Astrophysics and a Master's in Quantum ...

Astrophotographer Miguel Claro captured a stunning view of the Lion Nebula in the Cepehus constellation, revealing colorful clouds of ionized hydrogen gas. When you purchase through links on our site, ...

The mysteries of a strange era in the universe's history may have been uncovered by scientists. This "epoch of reionization" was a period in the early universe's history when the first stars and ...

Bob Benjamin was observing the Milky Way when he noticed something odd. The professor in the University of Wisconsin-Madison's astronomy department, and co-author of a new study, saw a red, tilted ...

ALTHOUGH it is well known that Population I objects in the galaxy move in approximately circular orbits, the detailed situation is not clear. Anomalies of various types have been found, non-circular ...

About 13 billion years ago, the universe emerged from a period of darkness, ushering in a cosmic dawn. As galaxies lit up with stars, they changed the chemical composition of their surroundings, ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. The Milky Way Galaxy in the nighttime sky above the HERA ...

The epoch of reionization, a period following the cosmic dark ages, marks the transition of the universe's predominantly neutral hydrogen gas to its currently ionized state, driven by the ionizing ...