A view of the Milky Way galaxy in microwaves, captured by the European Space Agency’s Planck satellite. The different colors correspond to different elements, including gas, dust, and energetic particles. (ESA/NASA/JPL-Caltech)

This NASA graphic shows how scientists used Hubble Space Telescope observations of a distant quasar to discover that two giant gas bubbles are erupting from the Milky Way’s core at 2 million mph. In this graphic, material shown in blue is moving toward the observer, while material in red is traveling away. (NASA, ESA and A. Field (STScI))

Caption: An artist’s rendition of the Milky Way galaxy shows the major arms that have been identified by scientists, though they’re not able to observe the galaxy face-on. (NASA/Adler/U. Chicago/Wesleyan/JPL-Caltech)

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