Not much is known about the tiny celestial bodies, which are hard to see.
"For an unambiguous confirmation of a brown dwarf or rogue planet, we need to see the absorption signatures of molecules — water and methane, primarily — in the spectra," Ray Jayawardhana, an astronomer at Cornell University and a member of the research team, said in the statement."Spectroscopy is time-consuming, and being able to observe many objects simultaneously helps enormously.
The study is part of Cycle 1 of the Guaranteed Time Observations program, which will occur during Webb's first year of operations.
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