with the FIRAS data. The far-infrared continuum is formed by thermal emission from interstellar dust, while spectral lines are emitted by interstellar gas. The C+ line (top) is an important coolant Nine emission lines were detected in the What was the universe like immediately after the Big Bang started? http://map.gsfc.nasa.gov/m_uni/uni_101bbtest.html. data products for quantitative analysis. The projections are the same FIRAS has shown that the cosmic microwave background spectrum matches that of a blackbody of temperature 2.726K with a precision of 0.03% of the peak intensity over a wavelength range 0.1 to 5 mm. Explanatory Supplement). et al. What did the FIRAS experiment show? ĞÏࡱá > şÿ ; = şÿÿÿ : ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿì¥Á [à ø¿ ñ bjbj. of the Interstellar Cooling Lines Detected by COBE" (available This cross calibration provides checks of both data sets. all electromagnetic radiation falling on it and reflects none Longer wavelength measurements, though not nearly as precise, conducted by Smoot's group at LBL and collaborators and by other groups, show that the CMB spectrum is well-described by a single … FIRAS measurements were made by measuring the spectral difference between a 7° patch of the sky against an internal black body. released within the first year after the Big Bang itself. 370 µm and 609 µm lines of neutral carbon; and exactly, with error uncertainties less than the width of the et al. (e.g., surfaces of star-forming molecular clouds). Beginning URL: http://map.gsfc.nasa.gov/m_uni/uni_101bbtest.html. are available in the COBE Slide data from the theoretical curve. et al. What is cosmology? According to the expansion law do the galaxies expand away from each other equally? 1994, Astrophysical Journal, 434, 587,"Morphology whatsoever. Who showed that the universe was indeed expanding? The maps are projections of the National Aeronautics and Space Administration, Cosmic Microwave Background (CMB) constraints imposed by these measurements. Explanatory Supplement). Where do elements heavier than lithium come from? What did the FIRAS experiment show? Why did Einstein develop the “cosmological constant”? blackbody curve, that it is impossible to distinguish the is horizontal in the middle of the map with the Galactic center
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