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IT might be a few years yet before humans travel to the edge of our galaxy, but at least we now know what it looks like. NASA yesterday released an amazing new image from the Hubble space telescope that shows galaxy NGC 4452.
That's it above - the thin glowing line which is actually billions of stars around a bright nucleus. NGC 4452 is one of around 2000 galaxies in the Virgo Cluster, which lies some 60 million light years away.
It's a rare shot because from Hubble's perspective, NGC 4452 lies directly edge-on to the Earth. The line you're seeing is the edge of the disc-shaped galaxy. The galaxy was first spotted back in 1784 by William Herschel, who described it as a "bright nebula, small and very much elongated".
NASA was also this week celebrating the first shot a brown dwarf star by its Wide-field Infrared Survey Explorer (WISE).
"The brown dwarfs jump out at you like big, fat, green emeralds," Amy Mainzer, the deputy project scientist of WISE at NASA's Jet Propulsion Laboratory in California, said. Ms Mainzer said the brown dwarf appeared green in WISE images because methane in its atmospheres absorbed infrared light that had been coded blue and it was too faint to give off the infrared light color-coded red. The only colour left was green.