Cosmological expansion is widely treated as a proven fact. It is not proven. For nearly a century, cosmology has told a ...

Cosmological redshift depends upon a galaxy's distance. Credit: NASA/JPL-Caltech/R. Hurt (Caltech-IPAC) In 1929 Edwin Hubble published the first solid evidence that the universe is expanding. Drawing ...

Do constants of nature—the numbers that determine how things behave, like the speed of light—change over time as the universe expands? Does light get a little tired traveling vast cosmic distances? It ...

For years, computer simulations of the earliest galaxies have struggled to match what telescopes actually show. Depending on ...

The Milky Way galaxy in which our solar system lies may exist in a "giant void", where space is about a fifth as dense as the universal average. This is the conclusion of a team of researchers from ...

Light released by a distant star does not simply wink out after crossing some threshold of space. In a vacuum, photons keep moving indefinitely, and astronomers routinely detect light that has ...

Scientists know very little about the mysterious force dubbed “Dark Energy” that seems to be quickening the expansion of the universe but, according to LSU Physics and Astronomy Associate Professor ...