Monday, June 11, 2012
Types of nebulae
Credit to present telescopes and the use of computers, have been able to expand thorough digital photos, using suitable software, can be colored to obtain spectacular images. The most remarkable aspects of the nebulae are their variety of shapes and structures.
Planetary nebulae be similar to planets while viewed during a telescope.They are in fact layer of material shack from an evolved star of average mass, from red giant to white dwarf. The Ring Nebula in the constellation Lira is a typical planet has a rotation period of 132,900 years and a mass about 14 times the mass of the Sun in the Milky Way have found several thousand planets. More spectacular but fewer in numbers are the remnants of supernovae, cute most significant representative of the Crab Nebula in Taurus, which vanishes at a rate of 0.4% per year. The nebulae of this type are intense radio sources, because of the explosions that the pulsar shaped and losrestos they became stars.
Herbig-Haro substance, which is named behind astronomer Guillermo Hark and the American G.Herbig, very bright small nebulae are found in very dense interstellar daubes are probably the product of gas jets expelled by stars in formation. Molecular clouds are, on the other hand, extremely large, of a width of many light-years, with a permanent profile and a faint, misty appearance. Herbig-Haro objects can be studied in the infrared. These objects vary in size and brightness in a few years. They are found in regions of active star formation. It is believed that these nebulae correspond to flows of high-speed gas ejected by young stars colliding with interstellar clouds. The revise of the Herbig-Haro objects helps to understand the details of how stars shape.
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