Not long ago, we couldn't see planets orbiting distant stars at all. Now astronomers have captured the passage of exoplanet Beta Pictoris b into the glare of its star … then its re-emergence 2 years later.
For decades, scientists have said that at least some of Earth's water came from comets and asteroids. New research suggests an even more primordial source, the vast cloud in space from which our world formed.
This new Juno spacecraft image shows magnificent swirling clouds in Jupiter's dynamic atmosphere. The craft was about 4,400 miles (7,000 km) from the planet's cloud tops on October 29, over about 40 degrees north.
Earlier in 2018, the Curiosity rover found evidence for abundant organic compounds - those containing carbon - on Mars. Does this mean Mars once had life? Or can some other process can explain it? Here's one idea.
NASA's Mars Curiosity rover drove about 197 feet (60 meters) over this past weekend to a site called Lake Orcadie. This was Curiosity's longest drive since experiencing a memory anomaly on September 15.
The star could be only a single generation removed from the Big Bang. It's the new recorder-holder for having the fewest "metals," that is, the fewest of the heavier elements made inside stars and released to space via supernovae.