Saturday, March 13, 2010

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galaxies NGC 4608 and NGC 4596 M78


Galaxies belonging to the Virgo Cluster, to find them, you can use the inverted reference having the Virgo cluster. Which is next to the Y is observed very weak But the farthest if seen very bright. The magnitudes are 12 and 11.40 respectively.

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Nebula M78 is the brightest diffuse reflection of the sky. Discovered by Pierre Méchain in early 1780, Charles Messier added it to his catalog the December 17, 1780. Belongs to Orion complex, a large cloud of gas and dust centered on the Orion Nebula M42/M43, and is about 1 600 light years away. It is the brightest portion of a vast cloud of dust which includes NGC 2071 (the Northeast, lower right in our image), NGC 2067 (near the northwest), and the very weak NGC 2064 (southwest), all visible in our image. Together with some other nebulae, including NGC 2024 (Orion B) near Zeta Orionis (sometimes called the Flame Nebula), all these nebulae are associated with the molecular cloud LDN 1630 (from the catalog Lynds Dark Nebula ) , part of the Orion complex.

As a reflection nebula, M78 is a cloud of interstellar dust that glow in the reflected and scattered light of bright blue (formerly type B), including HD 38563A brightest and second brightest HDE 35563B, both apparent visual magnitude of about 10. The nature of M78 as a reflection nebula was discovered by M. Vesto Slipher Lowell Observatory in 1919 (1919 Slipher ). At its distance, M78 measures almost 4 light years long.

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diffuse reflection nebula M59, M60, NGC 4649 and NGC 4638


The galaxy M59 is a member of the Virgo Cluster and one of the largest elliptical galaxies it, though it is considerably less luminous and massive ellipticals large M49, M60 and especially , M87. It's pretty flat, several sources provide values \u200b\u200bof ellipticity of E3-E5 (this E5 author believes, that is, its longest axis is about twice the smaller, but our values \u200b\u200bfor size are closer to E3). At a distance of 60 million light years, its longest axis, 5 arc min is characteristic of a linear extension of 90 000 light years. According to WE Harris' list, the galaxy M59 has a set of 1900 + / - 400 globular clusters, considerably less than the big three above, but higher than our Milky Way.

In our picture, the galaxy M59 is an ellipse elongated in the lower left, while on the right side are the galaxy M60 and its companion NCG (NGC) 4647. At the top is the barely perceptible NCG (NCG) 4638, an ellipse with photographic magnitude 12.2.

The M60 is a giant elliptical galaxies in the Virgo cluster. Like most Messier galaxies in this cluster (located in the east), is the last of the row of three (M58 , M59 and M60) that is seen in the visual field of a telescope aimed at this region sky. At low magnification, appears in the same field of view that the galaxy M59 (25 min / arc).

The galaxy M60 was discovered by Johann Gottfried Koehler on April 11, 1779 along with its neighbor M59 , while the comet was of that year. A day later, and independently, was detected by Barnabus Oriani, did not notice the galaxy M59 , and four days later, on April 15, 1779, by Charles Messier, who also discovered the next M58. Messier described M60 as a "little different" galaxies M58 and M59 .

Monday, March 8, 2010

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Parque Nacional Nahuel Huapi I

Andean Zone Ranges above the upper limit of the forest (over 1600 m) and covers the tops of the hills, stony and high mountain meadows. Represents 19% of the total area of \u200b\u200bthe park. It features rocky or sandy soils, usually loose, immature and superficial, being common landslides and avalanches.
The high mountain climate is cold and wet precipitation as snow or hail in all seasons, low relative humidity, high temperature range between day and night frosts, strong winds and high radiation. During the winter it is covered by a blanket of snow that usually exceed one meter thick.
Although observed from a distance, the tops of the mountains seem to be only rock and snow devoid of life, there are hundreds of grow and reproduce in the short snow-free season, challenging the extremely harsh conditions.
The vegetation is characterized by its small size, is stunted or cushion-shaped, leaving much of the bare soil. Predominant compound species and grasses. In this area there are three endemic species unique to this park: Abrotanella diemii, Senecio Menonvillea carbonensis and hirsuta.
This environment is one that has less richness in wildlife, finding so far 49 species of vertebrates. Of these, 40% drop this unit in the winter. We can mention the Pilquín or Chinchillón, an inhabitant of rocky places. Among small rodents are el Ratón de Pelo Largo y el Pericote Patagónico; el Ratón Topo Grande y el pardo, que pasan la mayor parte del tiempo bajo tierra.
Es zona de nidificación del Cóndor, y en los afloramientos rocosos son comunes los yales y dormilonas. No se encuentran aves y mamíferos acuáticos, debido tal vez a la escasez de alimento y de sitios de refugio en los cuerpos de agua.
También se encuentran lagartijas, ya que por ser resistentes al frío y vivíparas pueden vivir en ambientes de altura.

Thursday, March 4, 2010

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Introduction to Birdwatching

Curso de Introducción a la Observación de Aves
Los invitamos a participar del Curso de Introducción a la Observación Bird. It is oriented to the general public with guidelines for teachers.
The course is an invitation to contemplation and conservation of our natural environment. Through the birds can enjoy nature, we approached it, to accompany our children and moved by the beauty of life. Did you know that birds are excellent indicators of the state of the environment? Its presence or its absence is a clear indicator of what is happening around us. consists of 6-face meetings on Tuesdays and Fridays, beginning March 9, from 18:15 to 21 Hrs The place is the Garden dictation No. 3 in the Coastal (behind the building Angel Gallardo). 2 also made field trips to noon on Saturdays. Will be dictated by Mr. Agron. Silvana Alzogaray and Professor José Giménez. It costs $ 120.

Contacts: 442003 - 462684-15648414 Email
Sponsors SOW and Civil Association Birding in Bariloche .