Invisible cosmic travelers might be nudging our planets off course
In short: The universe's missing mass—dark matter—could be hiding in plain sight as tiny, ancient black holes. These microscopic giants may streak through our solar system once a decade, leaving behind measurable wobbles in the orbits of moons and planets as they pass by.
While most people associate black holes with massive stars collapsing into giants, primordial black holes (PBHs) offer a different origin story. These objects could have formed just after the Big Bang during an era of rapid cosmic expansion. During this period, tiny quantum fluctuations in space's density may have grown so extreme that certain spots collapsed into dense points, scattering PBHs throughout the cosmos.
If these primordial black holes account for dark matter—the mysterious substance thought to dominate our universe—their physical properties would be startling. Theories suggest they could have masses ranging from 10^17 to 10^23 grams. To put that in perspective, this is roughly the mass of a large asteroid compressed into a space no bigger than an atom.
A recent study published in Physical Review D suggests that if dark matter is composed of these PBHs, one likely zips through our solar system approximately every 10 years. While they are nearly invisible, their gravity still exerts influence. As a PBH sneaks by a large moon or a planet like Mars, it would nudge the celestial body off its path. This interaction causes a measurable 'wobble' in the orbit that grows over several years before eventually damping out.
This scenario is not just theoretical; it is testable. Because current instruments are sensitive enough to detect these orbital shifts, scientists can look for these specific gravitational signatures to confirm whether dark matter is indeed made of these ancient, microscopic black holes.
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Sources
- Summary by Intellect · source: Is There A Black Hole In The Solar System?! | Astronomic
- Also: Dark Matter Black Holes Could Fly through the Solar System Once a Decade
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