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Using a measurement of the clustering of the galaxies surveyed, plus other information derived from observations of the early universe, researchers have measured the Hubble constant with an uncertainly of less than 5 percent. The new work draws on data from a survey of more than 125,000 galaxies.

Two teams of astronomers have discovered the largest and farthest reservoir of water ever detected in the universe.

Earth's aurorae, or Northern and Southern Lights, provide a dazzling light show to people living in the polar regions. New research shows that aurorae on distant "hot Jupiters" could be 100-1000 times brighter than Earthly aurorae.

Research finds that black holes' spin and lateral movement can power bright jets of light known as quasars.

Researchers saw an unusual pattern when they looked at a "skymap" of the relative intensity of cosmic rays directed toward the Earth's Southern Hemisphere, with an excess of cosmic rays detected in one part of the sky and a deficit in another.

The potentially hazardous asteroid ‘(101955) 1999 RQ36’ has a one-in-a-thousand chance of impacting the Earth, and more than half of this probability indicates that this could happen in the year 2182, according to a new study.

Astronomers using NASA's Spitzer Space Telescope have discovered carbon molecules, known as "buckyballs," in space for the first time. Buckyballs are soccer-ball-shaped molecules that were first observed in a laboratory 25 years ago.

A hundred million years ago, a triple-star system was traveling through the bustling center of our Milky Way galaxy when it made a life-changing misstep. The trio wandered too close to the galaxy's giant black hole, which captured one of the stars and hurled the other two out of the Milky Way.

That dry, dusty moon overhead? Seems it isn't quite as dry as it's long been thought to be. Although you won't find oceans, lakes, or even a shallow puddle on its surface, a team of geologists has found structurally bound hydroxyl groups in a mineral in a lunar rock returned to Earth.

Scientists have found evidence that a giant black hole has been jerked around twice, causing its spin axis to point in a different direction from before.