Catch a glimpse of a few galaxies out of one hundred billion galaxies in our Universe with these NASA images. The image of ... black holes emitting high-energy X-rays. The black holes were ...

The universe began with a vast explosion that generated space and time, and created all the matter and energy in the universe ... gigantic black holes. The gas flowing into these black holes ...

In their study, the scientists examined both evolving dark energy and evolving dark matter. Their analysis showed that ...

The rest of the universe appears to be made of a mysterious, invisible substance called dark matter (25 percent) and a force that repels gravity known as dark energy (70 percent). Scientists have ...

NEW YORK (AP) — Distant, ancient galaxies are giving scientists more hints that a mysterious force called dark energy may not be what they thought. Astronomers know that the universe is being ...

Against most experts’ expectations, the result suggested that dark energy—the mysterious force driving the universe’s accelerating expansion—was not an unwavering constant but rather a ...