Is the Universe's expansion 'same in all directions?' Maybe not!
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Description
NASA's Chandra X-ray Observatory and ESA's XMM-Newton has been used to study the Universe and the results call into question how it is expanding. [Chandra Space Telescope: Revealing the Invisible Universe](https://www.space.com/18669-chandra-x-ray-observatory.html)
[XMM-Newton: Europe's Powerful X-ray Telescope](https://www.space.com/41346-xmm-newton-telescope.html)
Credit: NASA/CXC/A. Hobart
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