# Research on Venus's moon absence and solar system evolution > Live situation record from CLSTR: https://clstr.news/situations/research-on-the-absence-of-a-moon-around-venus > Updated: 2026-09-21T20:14:46.000Z. Sources: 24. Developments: 6. Astrophysical research published in The Astrophysical Journal suggests that Venus lacks a moon due to natural tidal physics and the planet’s slow rotation, rather than an exotic planetary catastrophe. Computer modeling led by astrophysicist Stephen Kane of the University of California, Riverside, in collaboration with researchers from the University of Bordeaux, indicates that any hypothetical moon orbiting Venus would likely have spiraled inward and been destroyed. While Earth’s rotation causes its moon to drift away, Venus’s slow rotation—taking approximately 242 to 243 Earth days—causes a moon to undergo orbital decay, moving toward the planet. Simulations suggest an embryonic moon could have existed for 30 million to nearly 2 billion years before crossing the Roche limit, the point where tidal gravity exceeds the moon’s own gravity. This would cause the satellite to be torn apart or collide with the planet’s surface. While the study does not confirm that Venus definitely had a moon, it demonstrates that the planet’s specific rotational characteristics would have made it extremely difficult to retain one. Researchers describe this potential process as “celestial cannibalism,” suggesting Venus may have destroyed its own moon. Adding to the complexity of Venus’s history, a study titled ‘The Lost Oceans of Venus’ by researchers Richard Ghail, Eloise Crouch, and Philippa Mason suggests the planet may have once possessed vast oceans. By identifying geological structures like polygonal fracture patterns, researchers estimate an ancient ocean could have covered approximately 90% of the surface, with a volume equal to about 40% of Earth's oceans. The study proposes that extreme heating eventually caused these oceans to evaporate. ## Timeline ### 2026-09-21: Venus may have once possessed vast oceans and a moon Recent studies suggest Venus may have once had oceans covering 90% of its surface and a moon that was eventually absorbed by the planet due to its slow rotation and gravity. 2 sources. https://clstr.news/cluster/venus-may-have-once-possessed-vast-oceans-and-a-moon ### 2026-09-21: Solar system evolution: Sun and Venus may have engulfed planetary bodies Scientific studies suggest the Sun may have swallowed a super-Earth in its youth, while simulations indicate Venus might have destroyed and engulfed its own moon. 2 sources. https://clstr.news/cluster/solar-system-evolution-sun-and-venus-may-have-engulfed-planetary-bodies ### 2026-09-19: Venus may have swallowed its own moon, study suggests New research suggests Venus may have once had a moon that spiraled inward and crashed into the planet due to its extremely slow rotation and gravitational pull. 4 sources. https://clstr.news/cluster/venus-may-have-destroyed-its-own-moon-researchers-suggest ### 2026-09-16: Venus may have swallowed its own moon, study suggests New astrophysical models suggest Venus may have swallowed its own moon due to tidal interactions and its slow rotational speed, rather than through a catastrophic collision. 2 sources. https://clstr.news/cluster/venus-may-have-swallowed-its-own-moon-study-suggests ### 2026-09-14: Venus may have consumed its own moon due to slow rotation Astrophysicists suggest Venus may have once had a moon that was consumed by the planet due to its extremely slow rotation and gravitational pull, causing the satellite to spiral inward and collide. 13 sources. https://clstr.news/cluster/venus-likely-consumed-its-moon-due-to-slow-rotation ### 2026-09-12: Venus lacks a moon due to tidal physics, study finds New astrophysical modeling suggests Venus lacks a moon because tidal physics would have caused any former moon to spiral inward and be torn apart by the planet's gravity. 3 sources. https://clstr.news/cluster/venus-lacks-a-moon-due-to-tidal-physics-study-finds --- Cite as: Research on Venus's moon absence and solar system evolution. CLSTR, https://clstr.news/situations/research-on-the-absence-of-a-moon-around-venus