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supergiant, adjusted for the distance to the host galaxy of the highly magnified star. The red diamonds are the actual data measured for Icarus. The observed wavelength of the Balmer discontinuity relative to its intrinsic wavelength (at about 365 nm) is an indicator of the distance to the star. The strength of the Balmer discontinuity depends on the strength of the star's gravity at its surface and its temperature.
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Scientists found that the Hubble data from MACS J1149+2223 Lensed Star 1 (Icarus) matches the model for a blue supergiant. The agreement shows a remarkably good fit, and indicates that Icarus is approximately twice as hot as the Sun. The solid blue line shows the model spectrum of the blue
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joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use.
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The following pages on the
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states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."
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data may be copyrighted if they are not explicitly produced by the
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The NASA website hosts a large number of images from the
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123:You can help
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22:File history
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
