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So IRF 3 is a class of STAR existing as a giant branch phase that's in a late light stages. And these stars are large with relatively cool temperatures and fairly high luminosity. They expel layers of material by way of intense star winds and then spew off material that see the universal cosmic dust. And this new study provides a very clear picture of how the process unfolds using the James West based on most most spectral data with models simulating star light. Star light passing two different configurations of dust. Scientists are able to determine that the best fit seems to be a layered shell-like structure of dust stretching approximately 10,000 astronauts from the start of the Earth. That's the distance the sun is away from us. So about 10,000 times that.