Astronomers have long been searching for Planet 9, a hypothetical ninth planet beyond Neptune that could explain anomalies in the outer solar system. However, despite years of searching, they have yet to locate it. As a result, astronomers have begun to explore other possibilities, including the idea that Planet 9 may not be a planet at all, but rather a primordial black hole.

Primordial black holes are black holes that formed during the early universe, shortly after the Big Bang. They are different from other types of black holes, such as those that form from the collapse of stars, in that they are not formed from matter but from fluctuations in the density of the universe.

If Planet 9 is indeed a primordial black hole, it would emit radiation when nearby objects are accreted, creating a visible flare. The upcoming Vera C. Rubin observatory, which is set to begin operations in 2023, will be sensitive enough to detect such flares.

The observatory’s wide field of view and sensitivity will allow it to detect even small impactors that cause accretion flares, including a potential primordial black hole in our solar system. If astronomers are able to detect such a flare, it could confirm the existence of a primordial black hole in our solar system.

While primordial black holes have not been directly detected yet, they could be more common than expected. The discovery of a primordial black hole in our solar system would shed light on a significant cosmological mystery, as well as provide new insights into the formation and evolution of the universe

In conclusion, while the existence of Planet 9 remains elusive, the possibility that it may be a primordial black hole offers new avenues for astronomical research. The upcoming Vera C. Rubin observatory will play a key role in this research, potentially confirming the existence of a primordial black hole in our solar system and shedding new light on the mysteries of the universe.