A new study based on observations with the NASA/ESA Hubble Space Telescope has shown that so-called brightest cluster galaxies (BCGs) — the very bright galaxies that inhabit the cores of rich galaxy clusters — have been aligned with their surroundings for at least 10 billion years. The giant elliptical galaxy in the center of this Hubble image is the most massive and brightest member of the galaxy cluster Abell 2261. Spanning a little...