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NASA's advanced observatories have unveiled the Milky Way's hidden beauty, from its dense core with a supermassive black hole to glittering star clusters and spiral arms. Infrared cameras pierce through gas and dust, revealing millions of stars. These images help astronomers study star formation, galactic dynamics, and the future collision with Andromeda, enhancing our understanding of our galactic home.

In 1925, Edwin Hubble's observation of Cepheid variables in the Andromeda galaxy revolutionized astronomy, proving the existence of galaxies beyond the Milky Way. This discovery, aided by telescopes like the Hooker and Hubble, transformed our understanding of the cosmos, leading to modern cosmology and inspiring research into cosmic expansion and galaxy formation.

NASA astronaut Megan McArthur retires after two decades of remarkable contributions, including piloting the SpaceX Dragon and crucial work on the Hubble Space Telescope. McArthur's career highlights her technical expertise and leadership, notably as the final astronaut to operate Hubble with the space shuttle's robotic arm.