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| ==About== | |||
| This is one of the most unusual nebulae known in the ]. Catalogued as HD 44179, this ] is more commonly called the 'Red Rectangle' because of its unique shape and colour as seen with ground-based ]. | |||
| The ] has revealed a wealth of new features in the Red Rectangle that cannot be seen by ground-based telescopes looking through ] turbulent ]. The origins of many of the features in this dying ] still remain hidden or even outright mysterious, some are well explained by theorists like the Dutch scientist ] from ] in the ]. | |||
| In 1981 ] and collaborators showed that a spherical ] from a ] hitting a dust torus would give rise to shocks that can produce cone-like outflows similar to the two cones seen in this nebula. | |||
| ] produce ] forecasts by advanced calculations of temperatures, pressures, velocities and densities for the air masses in our atmosphere and, to some degree, theorists like Icke are doing exactly the same for objects in space. Whether modelling the weather in the Earth’s atmosphere or the processes in distant gaseous nebulae, scientists calculate the motion of the gas by using a complicated set of expressions known as ]. | |||
| Most of the ] in the ] is in the form of gas. The weather on Earth gives rise to spectacular patterns such as ] and ] in the air masses here. Likewise, the ‘weather’ in gas clouds in space, like the Red Rectangle, can be fascinating. | |||
| Of the many different parameters in Vincent Icke’s calculations, only the density of the gas and the dust are observed in the nebula. | |||
| ==Links== | |||
| http://www.esa.int/esaCP/SEMHBNGHZTD_FeatureWeek_1.html | |||
| http://hubblesite.org/gallery/album/nebula_collection/pr2004011a/web_print | |||
| {{Uncategorized|February 2007}} | |||
Latest revision as of 17:40, 26 February 2007
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