For humans, the most important star in the universe is our Sun. The second-most important star is nestled inside the Andromeda galaxy. Don't go looking for it -- the flickering star is 2.2 million ...

Astronomers have detected an intensely brightening and dimming quasar that may help explain how some objects in the early universe grew at a highly accelerated rate. The discovery is the most distant ...

The six planets will be visible in the days immediately leading up to Jan. 21, and for about four weeks afterward. Mars, ...

The Parker Solar Probe flew within 3.8 million miles of the Sun's surface, the closest any spacecraft has ever gone.

For decades, scientists have tried in vain to accurately predict solar flares—intense bursts of light on the sun that can ...

NASA's Parker Solar Probe has flown into the Sun's corona. Structures known as coronal streamers and the Milky Way can be ...

You'll be able to view a rare alignment of planets this month and into February. Our astrotourism expert reveals the best ...

Two stars in Wolf-Rayet 140 collide, forming carbon-rich dust. Webb captured 17 expanding dust shells, revealing ...

The ESA Solar Orbiter has provided a stunning new look at the Sun by combining 25 high-resolution images. This mosaic offers a detailed view of the solar surface, including sunspots and granules, ...

The spacecraft built and operated by Texas-based Firefly Aerospace launched in the early Monday hours from Florida aboard a ...

Firefly's "Blue Moon" and ispace's "Resilience" are the latest in an ongoing push to gain private-sector experience exploring ...

The SpaceX rocket took off from NASA’s Kennedy Space Center in Florida at 1:11 a.m. ET. Tucked inside the rocket’s bullet-shaped nose cone were the two lunar landers — hailing from two different ...