We know our sun is surrounded by a great bubble-like heliosphere, which sets our solar system apart from the rest of interstellar space. ESA's Solar Orbiter - due to launch in February 2020 - will probe how the sun creates and controls this heliosphere.

Diamorpha on a Georgia mountaintop

For several years now, astronomers have been searching for a hypothetical Planet 9 in the starry sky. You can use the constellation Orion to show you approximately where they're looking.

The interior of Saturn's moon Enceladus is geochemically complex, making its subsurface ocean quite habitable for possible life, according to a new study from Southwest Research Institute.

Researchers have discovered 4 new species of sharks that use their fins to walk, in waters off northern Australia and New Guinea.

The Venus-Neptune in conjunction on January 27 was the closest planetary conjunction of 2020. But - because Neptune is so faint - it wasn't easy to capture. Plus a star near Venus confused people!

Observational astronomy and astrophysics work together to further our understanding of the cosmos. Astrophysicists apply the laws of physics and physical theories to interpret the light gathered by observational astronomers.

"We found the world's oldest asteroid strike in Western Australia. It might have triggered a global thaw."

In periods of four years, lunar perigees and apogees fall on the same, or nearly the same, calendar dates.

Proxima Centauri, the closest star to our sun, may have a second planet, according to researchers from the National Institute of Astrophysics. If confirmed, it would be an ideal candidate for direct imaging by new upcoming space telescopes.