Anne’s Picture of the Day: Spiral Galaxy NGC 4013
read more at Anne’s Astronomy News http://annesastronomynews.com/
May 5, 2013
NGC 4013, an edge-on spiral galaxy in Ursa Major
Image Credit & Copyright: R. Jay GaBany, Cosmotography (http://www.cosmotography.com)
NGC 4013 is a barred spiral galaxy of some 100 thousand light-years across, located about 55 million light-years away from Earth in the constellation of Ursa Major (also known as the Big Dipper), while it is receding from us at approximately 831 kilometers per second.
All spiral galaxies (including our own Milky Way galaxy) are highly flattened disk-like structures that resemble giant pancakes. The disk of this edge-on galaxy shows a distinct peanut-shaped bulge of stars that is consistent with a stellar bar seen perpendicular to the line of sight.
Most of its dust lanes lie in the galaxy’s plane, forming the dark band, about 500 light-years thick. This dark band, that absorbs the light of background stars, appears to cut the galaxy in two. By studying the color and the amount of light absorbed by these distant clouds in NGC 4013, astronomers can estimate the amount of matter in them.
These dark dust lanes are believed to be where new stars are formed. Later, when the dust disperses, the young stars become visible as clusters of blue stars. NGC 4013 shows several examples of these stellar nurseries, lying in front of the dark band along the galaxy’s equator.
NGC 4013 was long considered an isolated island universe. But, this deep color image also reveals a faint looping tidal stream of stars extending (above and toward the left) over 80 thousand light-years from the center of NGC 4013. The significantly redder color of the stream material compared to the outer parts of the disk suggests that this loop did not originate from the disk itself, but rather is the tidal stream of a dwarf galaxy being torn apart by tidal forces as it merged with NGC 4013.
This tidal stream also explains a warped distribution of neutral hydrogen gas seen in radio images of NGC 4013..
On December 30, 1989, the supernova SN 1989Z was discovered in NGC 4013.
n/a
Source: http://annesastronomynews.com/annes-picture-of-the-day-spiral-galaxy-ngc-4013/
Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.
"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.
Before It’s News® is a community of individuals who report on what’s going on around them, from all around the world. Anyone can join. Anyone can contribute. Anyone can become informed about their world. "United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.
LION'S MANE PRODUCT
Try Our Lion’s Mane WHOLE MIND Nootropic Blend 60 Capsules
Mushrooms are having a moment. One fabulous fungus in particular, lion’s mane, may help improve memory, depression and anxiety symptoms. They are also an excellent source of nutrients that show promise as a therapy for dementia, and other neurodegenerative diseases. If you’re living with anxiety or depression, you may be curious about all the therapy options out there — including the natural ones.Our Lion’s Mane WHOLE MIND Nootropic Blend has been formulated to utilize the potency of Lion’s mane but also include the benefits of four other Highly Beneficial Mushrooms. Synergistically, they work together to Build your health through improving cognitive function and immunity regardless of your age. Our Nootropic not only improves your Cognitive Function and Activates your Immune System, but it benefits growth of Essential Gut Flora, further enhancing your Vitality.
Our Formula includes: Lion’s Mane Mushrooms which Increase Brain Power through nerve growth, lessen anxiety, reduce depression, and improve concentration. Its an excellent adaptogen, promotes sleep and improves immunity. Shiitake Mushrooms which Fight cancer cells and infectious disease, boost the immune system, promotes brain function, and serves as a source of B vitamins. Maitake Mushrooms which regulate blood sugar levels of diabetics, reduce hypertension and boosts the immune system. Reishi Mushrooms which Fight inflammation, liver disease, fatigue, tumor growth and cancer. They Improve skin disorders and soothes digestive problems, stomach ulcers and leaky gut syndrome. Chaga Mushrooms which have anti-aging effects, boost immune function, improve stamina and athletic performance, even act as a natural aphrodisiac, fighting diabetes and improving liver function. Try Our Lion’s Mane WHOLE MIND Nootropic Blend 60 Capsules Today. Be 100% Satisfied or Receive a Full Money Back Guarantee. Order Yours Today by Following This Link.
| Visits: | 1,708,935,241 |
| Stories: | 8,451,597 |
Whistler Blowers, Insiders
