Interesting article and reference paper to read. From the article, "At its current rate, Phobos will complete its death spiral and hit Mars in around 40 million years. But if tidal forces are already tearing the moon apart, then the satellite could be completely destroyed long before then, researchers wrote."
Is this another indicator for a youthful solar system, much younger than the 4.5 Gyr model?
Reference - Numerical Simulations of Drainage Grooves in Response to Extensional Fracturing: Testing the Phobos Groove Formation Model,
https://iopscience.iop.org/article/10.3847/PSJ/ac8c33, 04-Nov-2022.
"Abstract The long, shallow, parallel grooves that cut across the surface of the Martian moon Phobos remain enigmatic, with distinct implications for understanding the evolution of loose airless soils and the origin of Mars and its satellites. Phobos orbits deep inside the fluid Roche limit and is gradually spiraling in, creating global tidal strain, which leads to a model in which orbital decay is driving the formation of surface grooves on Phobos..."
"Agnostic of the nature of its origin, equipotential analysis of Phobos (Hu et al. 2020) suggests that the current satellite might have been originally emplaced near 3.34 RM, giving a relatively young age of 93 Myr deduced from its current location. This leads us to consider two end-member candidates for the orbital histories of Phobos, as plotted respectively in Figure 8: on the one hand, beginning at ∼5.76 RM at 4.5 Gyr, and on the other hand, beginning at 3.34 RM at 93 Myr."
Okay, another indicator of very recent bombardment and catastrophism perhaps in the solar system. Saturn young age rings is another indicator along with issues at Jupiter, the moons, and Jupiter ring age.
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