Kuiper Belt
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Planet nine mystery deepens as new discovery challenges hidden planet theory
Planet nine mystery deepens as new discovery challenges hidden planet theory A hidden giant planet may be lurking beyond Neptune—but every new discovery seems to deepen the mystery. - Date: - June 8, 2026 - Source: - The Conversation - Summary: -
Prospects for Astrobiology and Technosignature Searches with the Vera C. Rubin Observatory Legacy Survey of Space and Time
arXiv:2606.00574v1 Announce Type: cross Abstract: The Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) will map sources in multiband colour--variability space. We present a prototype coherence-based framework for astrobiology and technosignature searches, in which candidates are treated as structured departures from natural astrophysical manifolds rather than isolated photometric outliers. We illustrate the framework with three simulated cases: five Kuiper Belt Object (KBO)...
The Moons of Uranus May Hold the Key to Finding Missing Planets
We have an idea of what the solar system's past was like: It was violent and chaotic. However, we are still studying how violent it was. Current models suggest that at some point after their formation, the giant planets went through a phase of such extreme instability that one or even two bodies the size of Uranus or Neptune were ejected into interstellar space.
Hundreds of new moons are revealing our solar system's violent history
In the far reaches of the solar system, the planetary neighbourhood seems quiet. Beyond Jupiter, the sun is no longer a blazing disc, but a cold, white lamp. The planets are separated by gulfs of darkness.