Trident, a new mission competing for selection under NASA’s Discovery Program, would explore Triton, a unique and highly active icy moon of Neptune....
A new study, published in the journal Icarus, shows that Naiad and Thalassa, two innermost moons of Neptune, are locked in an unusual type of orbital resonance.
The...
In the lab, scientists have pinpointed a specific wavelength of infrared light absorbed when molecules of carbon monoxide and nitrogen join together and...
A series of images taken by the NASA/ESA Hubble Space Telescope documents the formation of a Great Dark Spot on Neptune for the first time.
This is a composite...
A new study led by SETI Institute astronomers suggests that the recently-discovered moon of Neptune, Hippocamp, is probably an ancient fragment of a much...
Since its launch into orbit in 1990, the NASA/ESA Hubble Space Telescope has helped astronomers to amass an album of outer planet images. Yearly monitoring...
A close flyby of a Sun-mass star several billion years ago could explain some unusual features observed in the outer Solar System.
An artist’s concept...
The Multi Unit Spectroscopic Explorer (MUSE) instrument on ESO’s Very Large Telescope (VLT) has achieved the first light with a new adaptive optics mode...
The NASA/ESA Hubble Space Telescope has captured images of a large, dark storm on Neptune shrinking out of existence.
This series of Hubble images taken...
After many years of experiments, physicists have observed that under extreme temperatures and pressures, water takes on a new form called superionic ice....
A new experiment at SLAC National Accelerator Laboratory reveals how large diamonds may be formed from just hydrogen and carbon in the deep interior of...
An international team of planetary researchers from the University of Edinburgh, UK, and Jilin University, China, has used computer simulations to attempt...
An unusually bright storm system nearly the size of Earth has been spotted in the atmosphere of Neptune, baffling researchers because it is located near...
In the race to discover the recently proposed Planet Nine, a team of astronomers has discovered ten previously unknown objects beyond the orbit of the...
Our gas giants strip the icy surface off minor planets to form miniature versions of Saturn’s famous rings throughout the outer solar system, according...
Astronomers have discovered a new dwarf planet in the Kuiper Belt, a vast ring of icy debris that is encircling the outer rim of our Solar System just...
A team of astronomers detected a dark spot in the atmosphere of Neptune, in images taken with the NASA/ESA Hubble Space Telescope on May 16, 2016. This...
In a paper published online today in Nature, an international team of scientists explains how the cores of gas giants formed through the accumulation of...
