Using a telescope at Kitt Peak, scientists have produced the largest 3D map of the universe ever made and uncovered ...

New data further challenge the best scientific theory of the history and the structure of the universe. But a separate recent ...

The “dark energy” field that has fueled the expansion has been weakening over the past 4 billion to 5 billion years, new data shows.

New results from the Dark Energy Spectroscopic Instrument (DESI) suggest that the unknown force accelerating the expansion of the universe isn't what we believed it to be. This hints that our best ...

The new findings come from the Dark Energy Spectroscopic Instrument (DESI), which sits on a telescope at the Kitt Peak ...

The findings suggest that dark energy is dynamic and changes over time, and that it used to be stronger in the early stages of the universe but is weaker now. That’s particularly odd because most ...

The trails of stars are seen above Kitt Peak National Observatory, where a telescope is mapping the universe to study a mysterious force called dark energy. (NSF’s NoirLab) NEW YORK ...

Kitt Peak's got them all beaten with a window beyond ... to check out these massive telescopes. "It weighs about as much as a Honda Civic... and it's just a magical experience to look through ...

Scientists are homing in on the nature of a mysterious force called dark energy, and nothing short of the fate of the ...

Physicists had long assumed that the elusive force has constant strength. But the latest results from a project to map the ...

For decades, astronomers have relied on Einstein’s theory of relativity to explain the expansion of the universe, assuming ...