The Focus forum is now closed.
We're sad to make this announcement because, over the years, the forum has provided fascinating debate on science and technology, and we’ve often printed the discussions in the magazine.
We’d like to thank everyone who’s joined in and made it such interesting reading for fellow forum members and all of us who work on the magazine.
Graham Southorn, BBC Focus magazine
While some galaxies are rotund and others are slender disks like our spiral Milky Way, new observations from NASA's Spitzer Space Telescope show that the Sombrero galaxy is both. The galaxy, which is a round elliptical galaxy with a thin disk embedded inside, is one of the first known to exhibit characteristics of the two different types. The findings will lead to a better understanding of galaxy evolution, a topic still poorly understood.
"The Sombrero is more complex than previously thought," said Dimitri Gadotti of the European Southern Observatory in Chile and lead author of a new paper on the findings appearing in the Monthly Notices of the Royal Astronomical Society. "The only way to understand all we know about this galaxy is to think of it as two galaxies, one inside the other."
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