Astronomers can now find out the shape of any galaxy, and these pictures will explain why that's awesome


If you head out into the countryside far from the light pollution generated by the urban sprawl, and look to the skies, you'll be able to see humanity's place in the Milky Way galaxy. While our Solar System lies somewhere in the Orion arm of the galaxy, we are just a mote in its eye. Galaxies come in myriad of shapes and sizes, each containing billions of stars, with superclusters containing hundreds of galaxies.

Types of galaxies according to the Hubble classification scheme: an E indicates a type of elliptical galaxy; an S is a spiral; and SB is a barred-spiral galaxy.

Now astronomers are looking to find the precise 3-dimensional shape of any galaxy simply by analyzing it. Researchers have been trying to do this for more than 90 years, but a lack of technology, sophisticated telescopes, and computing power, meant they have thus far been unsuccessful.

The Pinwheel Galaxy, NGC 5457

Also hampering the research has been the continuous movement of the galaxies away from each other as the universe expands. Now, a cohort of researchers from the University of Sydney, with Dr Caroline Foster as lead researcher, has finally found a way to gauge the shape of a galaxy simply by linking it to its rotation and spin speed.

NGC 3923 Elliptical Shell Galaxy

"This is the first time we've been able to reliably measure how a galaxy's shape depends on any of its other properties — in this case, its rotation speed," Dr Caroline stated. The research has been published in the journal Monthly Notices of the Royal Astronomical Society.

NGC 1300, an example of a barred spiral galaxy

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