Tag: Galaxies

Hubble Spots a Galaxy Shrouded by Stars

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2 min read Hubble Spots a Galaxy Shrouded by Stars This Hubble image shows irregular galaxy, ESO 245-5, located some of 15 million light-years from Earth. ESA/Hubble & NASA, M. Messa This NASA/ESA Hubble Space Telescope image shows a densely packed field of stars laid upon a background of dust, gas, and light from more distant celestial objects. There are so many stars in this image’s field of view that it may be a little tricky to discern that you are in fact looking at a galaxy. Known as ESO…

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Telescopes Show the Milky Way’s Black Hole is Ready for a Kick

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NASA/CXC/M.Weiss This artist’s illustration depicts the findings of a new study about the supermassive black hole at the center of our galaxy called Sagittarius A* (abbreviated as Sgr A*). As reported in our latest press release, this result found that Sgr A* is spinning so quickly that it is warping spacetime — that is, time and the three dimensions of space — so that it can look more like a football. These results were made with NASA’s Chandra X-ray Observatory and the NSF’s Karl G. Jansky Very Large Array (VLA). A team of researchers applied a new…

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NASA’s Hubble Traces ‘String of Pearls’ Star Clusters in Galaxy Collisions

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3 min read NASA’s Hubble Traces ‘String of Pearls’ Star Clusters in Galaxy Collisions Galaxy AM 1054-325 has been distorted into an S-shape from a normal pancake-like spiral shape by the gravitational pull of a neighboring galaxy, seen in this NASA Hubble Space Telescope image. A consequence of this is that newborn clusters of stars form along a stretched-out tidal tail for thousands of light-years, resembling a string of pearls. They form when knots of gas gravitationally collapse to create about 1 million newborn stars per cluster. NASA, ESA, STScI,…

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What is Dark Energy? Inside our accelerating, expanding Universe

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11 min read What is Dark Energy? Inside our accelerating, expanding Universe Some 13.8 billion years ago, the universe began with a rapid expansion we call the big bang. After this initial expansion, which lasted a fraction of a second, gravity started to slow the universe down. But the cosmos wouldn’t stay this way. Nine billion years after the universe began, its expansion started to speed up, driven by an unknown force that scientists have named dark energy. But what exactly is dark energy? The short answer is: We don’t…

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Hubble Views a Dim but Distinct Galaxy

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2 min read Hubble Views a Dim but Distinct Galaxy Both visible and ultraviolet wavelengths of light comprise this Hubble Space Telescope image of the spiral galaxy UGC 11105. ESA/Hubble & NASA, R. J. Foley (UC Santa Cruz) This image of the softly luminous spiral galaxy UGC 11105 is from the NASA/ESA Hubble Space Telescope. It lies about 110 million light-years from Earth in the constellation Hercules. Astronomers have different ways of quantifying how bright celestial objects are. Apparent magnitude is one of those methods. It describes how bright an…

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How do galaxies grow while ensnared in the universe’s cosmic web?

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Just like being trapped within a spider’s web drastically changes a fly’s life, galaxies ensnared in the vast cosmic web are dramatically and irreversibly altered. Now, scientists from the University of Kansas are aiming to better understand the mechanisms at play in shaping clusters of galaxies as they travel through a cosmic web of different environments. KU professor of physics and astronomy Gregory Rudnick is leading the effort, which involves recreating the cosmic web in a computer simulation, then studying gas content and star-formation properties of galaxies as they move…

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Hubble Observes a Galactic Distortion

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1 min read Hubble Observes a Galactic Distortion The galaxy NGC 5427 shines in this new NASA Hubble Space Telescope image. NASA, ESA, and R. Foley (University of California – Santa Cruz); Processing: Gladys Kober (NASA/Catholic University of America) The galaxy NGC 5427 shines in this new NASA Hubble Space Telescope image. It’s part of the galaxy pair Arp 271, and its companion NGC 5426 is located below this galaxy and outside of this image’s frame. However, the effects of the pair’s gravitational attraction is visible in the galactic distortion…

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Hubble Spies a Spinning Spiral

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2 min read Hubble Spies a Spinning Spiral This new NASA Hubble Space Telescope image features the face-on spiral and Seyfert galaxy, ESO 420-G013. NASA/ESA/A. Evans (University of Virginia)/Processing: Gladys Kober (NASA/Catholic University of America) Looking like a baseball lobbed into the depths of the universe, ESO 420-G013 is a face-on spiral galaxy and a Seyfert galaxy. Dark lanes of dust are visible against the background glow of the galaxy’s many stars.  About 10 percent of all the galaxies in the universe are thought to be Seyfert galaxies. They are…

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NASA’s Webb Depicts Staggering Structure in 19 Nearby Spiral Galaxies

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6 Min Read NASA’s Webb Depicts Staggering Structure in 19 Nearby Spiral Galaxies Webb’s set of 19 PHANGS images of face-on spiral galaxies. Credits: NASA, ESA, CSA, STScI, Janice Lee (STScI), Thomas Williams (Oxford), and the PHANGS team It’s oh-so-easy to be absolutely mesmerized by these spiral galaxies. Follow their clearly defined arms, which are brimming with stars, to their centers, where there may be old star clusters and – sometimes – active supermassive black holes. Only NASA’s James Webb Space Telescope can deliver highly detailed scenes of nearby galaxies…

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Hubble Studies a Sparkling Galaxy Pair

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1 min read Hubble Studies a Sparkling Galaxy Pair This new NASA Hubble Space Telescope image features a pair of interacting galaxies called, NGC 5410 and UGC 8932/PGC 49896. NASA/ESA/D. Bowen (Princeton University)/Processing: Gladys Kober (NASA/Catholic University of America) A pair of small, interacting galaxies shine in this new NASA Hubble Space Telescope image. The larger of the two galaxies is named NGC 5410 and was discovered in 1787 by British astronomer William Herschel. It spans 80,000 light-years across and has a bright white bar of stars at its center.…

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