Airbus Defence and Space

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• Illustration divided into quadrants, showing the evolution of a star system over time. The upper left is labeled 1. Sun-like star. It shows a small, glowing yellow star centered with other faint stars in the background of space. The upper right quadrant is labeled 2. Red giant. It shows a much larger, puffy orange-red star with a yellow glow within. The bottom left quadrant is labeled 3. White dwarf with second-generation protoplanetary disk, showing a bright white star, smaller than the origina图：NASA
• Line graph titled HS 0209+0832, White Dwarf Atmosphere Features. Hubble Space Telescope spectral data is shown in white, compared with a best fit model in red. The vertical y axis is labeled Brightness, with brighter at the top and dimmer at the bottom. The horizontal x axis is labeled Wavelength of light, angstroms. One-third of the way across the x axis is labeled 1452. To the right of the graph’s center is angstrom label 1453, and the right edge of the graph is labeled angstrom 1454. Three dr图：NASA
• 图：NASA
• 图：NASA