Enter the Space & Beyond Box Photo Contest! Beyond its bizarre appearance, the real mystery is how this kind of configuration could have ever arisen. by neufer » Mon Jul 29, 2013 1:10 am, Post Hoag's Object spans about 100,000 light years and lies about 600 million light years away toward the constellation of the Snake (Serpens). It can’t be there. Hoag’s Object is unique in the cosmos. The Venera program: Interplanetary probes from behind the Iron Curtain. Collisions of this sort either result in wild distortions like M82 or the Antennae Galaxies (see objects 47 and 45 on our list, respectively) or a merger into a new elliptical shape like that of M87 (object 25). Gobekli Tepe: The first astronomical observatory? One scientist thinks a barred galaxy can go through extreme instability that brings about this shape, while others point out that, if that were the case, the nucleus would be disk-shaped rather than the ball now seen. Ring-Ring. Hoag's Object was discovered in 1950 by Arthur Hoag. Follow APOD on: Facebook or Google Plus Hoag’s Object, with a background ring galaxy. by Ann » Sun Jul 28, 2013 6:47 am, Post by Galaxian » Sun Jul 28, 2013 6:42 am, Post Collisions can also create density waves, which computer simulations show can sometimes produce a bright outer ring. Hoags Object: A Strange Ring Galaxy Explanation: Is this one galaxy or two? The Bridge: Discuss an Astronomy Picture of the Day. But the lack of any candidates in the vicinity, plus the slow spin of the core compared to the motions of the ring, makes most astronomers reject this hypothesis. Other “classic” ring galaxies are believed to have resulted from a large disk-shaped spiral galaxy being penetrated and tidally disrupted by an invading companion. by Chris Peterson » Sun Jul 28, 2013 11:43 pm, Post What are the chances that another ring should appear within its own ring? It's fasscinating to ponder what the night sky might look like to a being on a planet orbiting a small star somewhere towards the inner edge of the outer ring.... First, I have no astronomy training - I dropped AST 301 due to a personality conflict with the idiot teaching it. Can't resist going off topic again. Happily for us, they come in only a few varieties, making them easier to identify and theorize about. I like Ring Galaxies. by geckzilla » Mon Jul 29, 2013 2:59 am, Return to “The Bridge: Discuss an Astronomy Picture of the Day”. Hoag’s Object outside of it’s outer blue ring, is also made up of an inner yellow circle called the nucleus. by gmPhil » Sun Jul 28, 2013 4:02 pm, Post NASA’s flying SOFIA telescope confirms water in the Moon’s soil, Earth’s biggest telescopes reopen after months of COVID closures, Game theory helps focus the hunt for alien civilizations, OSIRIS-REx is literally overflowing with asteroid samples from Bennu, The Sky This Week: View Venus, Vesta, and Ceres, The Sky This Week: Venus and the Moon meet in Cancer, The Sky This Week: See stormy Jupiter and Neptune at opposition, Infinity & Beyond — Episode 9: Saturn's rings, Infinity & Beyond — Episode 8: Black holes 101, Queen guitarist Brian May and David Eicher launch new astronomy book. by Ann » Sun Jul 28, 2013 7:43 am, Post Last chance to join our 2020 Costa Rica Star Party! In this scenario, the quasar’s light is distorted into a halo by space-warping caused by a massive foreground spherical galaxy that it seems to surround. This question came to light in 1950 when astronomer Art Hoag chanced upon this unusual extragalactic object.On the outside is a ring dominated by bright blue stars, while near the center lies a ball of much redder stars that are likely much older. It lies at a distance of between 602,000,000.00 and 62,140.00 light years away in the constellation of Serpens. But later spectroscopic studies rejected this because the golden central ball and the blue ring have exactly the same redshift, indicating a whopping rush-away speed of 7,916 miles (12,740 kilometers) per second, which proves they’re both located exactly the same distance from us. Receive news, sky-event information, observing tips, and In 1950, astronomer Arthur Hoag came upon a tiny, faint, 16th-magnitude ring surrounding a ball-like center, and reasonably assumed it was a planetary nebula — a nearby puff of gas expelled from a single old-aged star. Some think Hoag’s Object resulted from a small galaxy passing through a larger one like a cannon ball, 2 to 3 billion years ago. It's very tempting to say it's some kind of cosmic joke. by APOD Robot » Sun Jul 28, 2013 4:10 am, Post by Beyond » Sun Jul 28, 2013 9:52 pm, Post Instead, the nucleus sits all by itself in space. by neufer » Sun Jul 28, 2013 12:19 pm, Post by geckzilla » Sun Jul 28, 2013 3:49 pm, Post by Chris Peterson » Mon Jul 29, 2013 1:23 am, Post Cruise to totality in the South Pacific with Astronomy in 2020. However, none have a ring that surrounds emptiness that in turn surrounds a giant yellow ball of suns. He also proposed an alternative and far more exotic explanation that this was an “Einstein Ring” from a faraway quasar. In the picture above, between the core and the outer ring in the one o’clock direction, you’ll see a second ring galaxy! Between the two is a gap that appears almost completely dark. Image credit: NASA. more from Astronomy's weekly email newsletter. Do you supose the Sombrero Galaxy would look like this if it were viewed from above or below rather than edge on? Just call me "geck" because "zilla" is like a last name. APOD and General Astronomy Discussion Forum, Post Hoag's Object is a non-typical galaxy of the type known as a ring galaxy. What makes Hoag’s Object so interesting is the brightness of the ring and the clear, wide separation between the yellow elliptical “body” and the blue ring. Nearly all are either elliptical (ball-shaped), irregular, or else spirals of various kinds. In 2002, the ultra-sharp optics of the Hubble Space Telescope revealed Hoag’s Object, as it is now called, as a perfect blue ring of stars, dust, and gas, complete with knotty clumps that are unresolved star clusters. Order now to get your Black Holes Collection from Space & Beyond Box! by Galaxian » Sun Jul 28, 2013 6:54 am, Post by Ann » Sun Jul 28, 2013 7:49 pm, Post Plus, get FREE SHIPPING & BONUS GIFT! Unfortunately, one idea after another has been proposed and then rejected. By signing up you may also receive reader surveys and occasional special offers. by geckzilla » Sun Jul 28, 2013 7:54 pm, Post by Beyond » Sun Jul 28, 2013 4:18 am, Post It’s impossible, really. NASA/The Hubble Heritage Team (STScl/AURA). This cosmic turducken is known as Hoag's object, and it has befuddled stargazers since astronomer Arthur Hoag discovered it in 1950. Hoag’s Object is so far away that its apparent width is only one quarter of an arcminute, resembling the tiny diameter of Mercury. by Ann » Sun Jul 28, 2013 9:18 pm, Post Hoag’s Object, a galaxy 600 million light-years away, has a familiar yellow core and a normal outer region of young blue stars, but the rest of it is missing. This one also reminds me of an inner tube, just calmly floating about, in the ocean of space. Many galaxies far in the distance are visible toward the right, while coincidentally, visible in the gap at about seven o'clock, is another but more distant ring galaxy. We do not sell, rent or trade our email lists.
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