The sky is full of weird X-shaped galaxies. Here's why.

The sky is full of weird X-shaped galaxies. Here

Astronomers discover giant wave-shaped structure in the Milky Way

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What is the Milky Way? It's our home galaxy

Ring galaxies, the rarest in the Universe, finally explained - Big Think

Solved for X: Mystery behind x-shaped galaxies, PDBY

What is a galaxy? - BBC Sky at Night Magazine

Space Education & Awareness Drive

Hubble's Deep Fields

Sprightly Stars Illuminate 'Christmas Tree Cluster' - NASA