This image from the Hubble Space Telescope depicts the unbarred spiral galaxy NGC 5033, situated approximately 40 million light-years away in the constellation Canes Venatici (the Hunting Dogs).

Why it's so special: This image of a spiral galaxy taken by the Hubble Space Telescope is a portrait more than two decades in the making. Like most full-color images of space objects, it's a ...

But astronomers scrutinizing this particular Hubble image found the central galaxy actually sports a swirl of spiral arms seemingly unruffled by any such merger, raising new questions about what ...