Walker found about dying radio galaxy, plasma duct and radio galaxies while exploraing beyound the Milky way galaxy.
When Walker decides that she wants to explore beyond the Milky Way she found faintest dying radio galaxy, whistling plasma ducts in the Earth's ionosphere and some of the youngest and weirdest radio galaxies so we can conclude that Walker found about dying radio galaxy, plasma duct and radio galaxies.
Learn more about Milky way here: https://brainly.com/question/13956361