The Milky Way glitters over ESO Paranal Observatory

The Milky Way glitters over Paranal Observatory atop Cerro Paranal in Chile's high Atacama Desert in this amazing image by ESO photo ambassador Yuri Beletsky. 

Here, two unit telescopes with Paranal's Very Large Telescope (VLT) take center stage.

Between the two telescopes are the Large Magellanic Cloud and Small Magellenic Cloud, dwarf galaxies near our own Milky Way.

Meanwhile, the Coalsack Nebula can be spotted as a dark mark obscuring part of the Milky Way at upper left.

To see more amazing photos from the observatory, visit: Spectacular Cosmic Visions from ESO's Paranal Observatory 

Milky Way Neighbouring Galaxies Get Amazing Portraits in UV

Nearly a million ultraviolet sources appear in this mosaic of the Large Magellanic Cloud, which was assembled from 2,200 images taken by Swift's Ultraviolet/Optical Telescope.

CREDIT: NASA/Swift/S. Immler (Goddard) and M. Siegel (Penn State)

Stitching together thousands of images, astronomers have created the most detailed ultraviolet light portraits of the Milky Way's two closest neighbors: the Large and Small Magellanic Clouds.

The stunning wide-field results give scientists a peek at the hot young stars of these satellite galaxies, which hover around the Milky Way less than 200,000 light years away.

The mosaics were assembled by astronomers at NASA and Pennsylvania State University using the space agency's Swift satellite. The images were unveiled last week at the American Astronomical Society (AAS) meeting in Indianapolis.

"Prior to these images, there were relatively few UV observations of these galaxies, and none at high resolution across such wide areas, so this project fills in a major missing piece of the scientific puzzle," Michael Siegel, lead scientist for Swift's Ultraviolet/Optical Telescope (UVOT), said in a statement.

The Large Magellanic Cloud (LMC) is one-tenth the size of the Milky Way, and the Small Magellanic Cloud (SMC) is just half that size. But since both are relatively close to our own galaxy, they appear quite large — too large to fit in UVOT's field of view. That's why researchers needed thousands of images to cover both galaxies.

The portrait of LMC, cobbled together from 2,200 snapshots, has a resolution of 160 megapixels and reveals about 1 million ultraviolet sources, according to a statement from NASA.

The 57-megapixel mosaic image of the SMC, meanwhile, is made of 656 individual images and shows about 250,000 ultraviolet sources.

Ultraviolet images allow astronomers to look at the hottest young stars and star-formation regions while blocking out older stars, mostly those more than 500 years old, which don't emit as much light at such higher energies.

One particularly dazzling piece of the LMC portrait shows the Tarantula nebula, where powerful stellar winds from newborn stars create a spider-like shape.