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Uploaded on May 02, 2021 02:19 UTC
A red giant only 36.7 light years away. Arcturus is a cooler star, T ~ 4300 K, as can be seen from the lower blue-violet intensities and fitting the spectrum to black body radiation. Black-body radiation is the "thermal electromagnetic radiation within or surrounding a body in thermodynamic equilibrium with its environment, and emitted by a black body." It has a specific spectrum of wavelengths, inversely related to intensity that depend only on the body's temperature. See "Planck's law of black-body radiation." SEE ALSO: CN BOOTIS
Operations enable reversible modification of data -- they act like filters which process the data. The graph you see above represents the data after these operations have been run. Delete them to undo their effects, or to apply them in a new order.
#000-style suffix, like subtract:3243#2414 are referring to a specific snapshot (in this example, #2414) of another spectrum. Click to learn more.
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