From BRIGHT SIDE.

Why do 36 of Andromeda’s 37 satellite galaxies point toward the Milky Way? This strange alignment presents a serious Andromeda galaxy mystery that defies the Lambda CDM model, the leading theory of cosmology. Discover why this bizarre cosmic imbalance may reveal a deeper dark matter problem in our understanding of the universe.
Credit:
Blazars at Galactic North Pole: By NASA/DOE/Fermi LAT Collaboration, https://svs.gsfc.nasa.gov/10505/
NASA Animation Sizes Up the Universe’s Biggest Black Holes: By NASA’s Goddard Space Flight Center Conceptual Image Lab, https://svs.gsfc.nasa.gov/14335
Why NASA’s Roman Mission Will Study Milky Way’s Flickering Lights: By NASA’s Goddard Space Flight Center, https://svs.gsfc.nasa.gov/14438/
Animation is created by Bright Side.

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