How NASA's Nancy Grace Roman Space Telescope will open a window into the Milky Way

Look up at the night sky with the naked eye and it may seem like it rarely changes. Yet the universe is in constant flux. Stars drift through space, orbiting the center of the Milky Way as planets orbit them. They rotate, showing spots on their surfaces and sometimes producing violent outbursts that affect planetary atmospheres much like solar storms produce auroras on Earth.

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