At https://www.space.com/pluto-problem-time-to-rethink-definition-of-a-planet …. back in 2006, Pluto was downgraded. It was not a planet anymore as far as astronomers were concerned. One reason was the fact there were further space rocks of a similar size not too far out from Pluto. One about the same size is Eris. How do you define a planet – as opposed to dwarf planets and asteroids.
At https://www.sciencealert.com/astronomers-discover-complex-carbon-molecules-in-interstellar-space … molcecules containing carbon have been discovered in a distant interstellar cloud of gas and dust. In other words, complex organic molecules, including carbon and nitrogen, probably existed in the gas cloud that gave rise to our solar system. Carbon chemistry is the backbone of life on earth.
At https://phys.org/news/2024-10-mars-habitable-thought.html … it is thought, by some scientists, that Mars may have been habitable for much longer than theorised. Actually, the mainstream story line doesn’t change very much. Only a few million years are projected. Not exactly shattering.