The remarkable and completely unexpected find has called into doubt what we know of atmospheric retention.
The James Webb Space Telescope has captured a spectacular new image of Neptune and its rings.
Scientists have announced the discovery of 139 new objects situated in the far reaches of our solar system.
The undiscovered theoretical planet in the outer reaches of our solar system may actually be a black hole.
Scientists have successfully identified an entirely new moon in orbit around the gas giant Neptune.
Astronomers have found what is thought to be the first confirmed moon in orbit around an extrasolar world.
For the first time ever, scientists have detected helium in the atmosphere of a planet in orbit around a distant star.
Astronomers have been analyzing the atmosphere of a Neptune-sized planet located 430 light years away.
A strange object spotted beyond the orbit of Neptune appears to be going around the sun in reverse.
Astronomers have identified a previously unknown dwarf planet in the outer reaches of the solar system.
The case for a hidden gas giant in the outer solar system continues to go from strength to strength.