The disk spans nearly 400 billion miles – around 40 times the diameter of our solar system.
Scientists say the unusual formation is the result of a meteorite impact.
The demonstration mission saw the test spaceships – each around 1 meter wide and 2.5 centimeters thick – launched into low orbit.
Astronomers say the "huge" new world is six times the size of Jupiter.
Astrophotographers observing Comet C/2025 A6 (Lemmon) captured how rapidly Earth’s near-space environment is being polluted by artificial satellites.
Sugars essential for biology have been discovered in a gum-like substance in fragments from the Bennu space-rock.
NASA's Solar Dynamics Observatory captured images of the event on the Sun.
Enceladus is Saturn's sixth-largest moon, a 500 km-wide icy world famed for its south polar geysers spewing water from a subsurface ocean.
Researchers say the dust-producing stars in Apep are sending out dust at 1,200 to 2,000 miles per second.