A new computer modeling study shows that - some 4 billion years ago - a barrage of incoming debris from space likely formed what we know today as Earth’s oldest rocks.

This free-floating rogue planet - untethered to any star - has a magnetic field millions of times more powerful than Earth's and auroras much more brilliant than our world's northern lights.

Decades of work have gone into probing the heart of our Milky Way galaxy. Click in for a video showing stars orbiting the 4-million-solar-mass black hole at our galaxy's core.

Computer modeling suggests that - billions of years ago, when our solar system was young - a star swept near, stealing some of our sun's material and creating the odd orbits of Kuiper Belt objects.

Chorus waves can be converted to sound. The ones around Earth sound like singing or chirping birds. Jupiter has stronger chorus waves, and now its large moon - Ganymede - has been found to have chorus waves a million times stronger than Jupiter's.

Launch of the daredevil Parker Solar Probe - which will get closer to the sun than any spacecraft in human history - has been delayed until Sunday, August 12.

The Parker Solar Probe, expected to launch Saturday, will get closer to the sun than any spacecraft in human history. How will the spacecraft withstand the heat?

Fast radio bursts - aka FRBs - are brief, powerful, puzzling bursts of radio waves from deep space. Now astronomers have detected a new and even more unusual type of FRB.

New research indicates that plate tectonics may not be necessary for life to evolve after all, increasing the chances that more exoplanets could support life of some kind.

Viewed under a microscope, it resembles a human hair. But this is actually an extremely precious speck of dust – a tiny sample from the Itokawa asteroid, brought back to Earth by Japan’s Hayabusa mission.