What if we’ve been looking for worlds like ours in the wrong places?
“It adds a new dimension in our search for habitability. It may be a negative dimension or it may be a positive dimension,” said Ted Bergin, a planetary scientist at the University of Michigan and the study’s lead author, in a universityThe team posits that worlds forming in and around the soot line would have carbon-rich surfaces distinct from Earth’s.
. Between the soot line and a star, organic compounds sublimate into gasses, reducing the amount of that material that would otherwise contribute to a planet’s formation.The team modeled how a silicate-rich planet might develop in the soot line, and found that such a world would have an atmosphere rich in methane, similar to the large moon Titan. They would sit between water-rich worlds and rocky worlds, the team expects.
“Planets that are born within this region, which exists in every planet-forming disk system, will release more volatile carbon from their mantles,” Bergin said. “This could readily lead to the natural production of hazes. Such hazes have been observed in the atmospheres of exoplanets and have the potential to change the calculus for what we consider habitable worlds.”, life beyond Earth may look very different from what we see on Earth.
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