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Hubble Ultra Deep Field in near-infrared light
Hubble Ultra Deep Field in near-infrared light

Image: NASA, ESA, G. Illingworth and R. Bouwens (University of California, Santa Cruz), and the HUDF09 Team

This Hubble Space Telescope image reveals thousands of galaxies in one of the deepest views ever taken in near-infrared light. The image shows galaxies in a variety of shapes, sizes, and colors. The faintest and reddest objects are galaxies that existed about 12.9 billion to 13.1 billion years ago, when the universe was young. Many of these galaxies cannot be seen in visible light because the light is stretched to infrared wavelengths by the expansion of space.