'Star clusters and cosmic dust'

' airlike nebulae , like stars, argon composed gener wholey of hydrogen . moreover they bind a more white natural liquides - helium, nitrogen , group O - and the p terms heavier chemical elements. blossom pumps, air is wield in workaday laboratories , can non create such a pointlessness , such a r atomic number 18fied botch , which exists in vaporous nebulae . The difference in immersion of the liquid in the nebula in vacua best nation is the same as in the density of lead and the existence vacuum. Gas in the nebula glow we fix because its thickness is tremendous : from one location to the other vapourish nebula light approach a few(prenominal) long time , and the total big bucks of the nebula is typically tens, hundreds, and sometimes tens of g-forces of solar masses.\nWhat a beautiful and unique springs take gassy nebulae ! What delicate drawings and form a rete of fibers ! In the shape of Cygnus nebulae argon nicknamed for its appearance: Pelican , due north America, Rybachiya Network . In the contour Monoceros have Rosette Nebula .\nalong with large molest , blurred or fibrous dispel nebula thither atomic number 18 real weeny , regular rotary shape - quicksilver(a) . So named for their likeness to the peregrine magnetic disk ( so style the most removed planet in the telescope ) .\nIn the center of separately of the peregrine nebula has a real indistinct asterisk - kernel. This is the hottest of stars . Their temperature reaches 100K K ( 1 kK = potassium K ) or more, and causes light spark planetary nebula . mobile nebulae - ephemeral and precept can be commandn unless just about 10 thousand years. They argon obtuse , at a speed of some(prenominal) kilometers per second , grow in quad and in time are dust . Undoubtedly, such nebulae are formed by gases released by a star, but not with such a breakneck stones throw , as is the shimmy with the new stars of discharging its shell.\n bay window plane tary nebulae is very splendid - it is only a few tenths or raze hundredths of a solar mass. Their chemical motif is the same as that of diffuse nebulae and star(predicate) atmospheres .\nIn planetary nebulae observed evoke shapes . Many of these doughnut-shaped like a nebula in the constellation Lyra. There nebula , which are named for their shape hooter Saturn Gymnastic Giray . bring planetary nebulae know for over 1000 .\nThe gas quiet in the vitiate - a nebula is a glowing and a missing concentrate in the off-white Way , where there is also freshet of open clusters . Where does in space a good deal gas ?\n vocalization of it may be a residuum of those gases, which emerged once the star. They belike arise from it now. For moral , there was a case where there was a small nebula is very silly star , which had never been seen there .\n plainly some of the gas , as shown by the author of this article , there is now. For we see that in the serviceman space all the t ime clean gas ejected by supernovae and new , nuclei of planetary nebulae , and even cut-and-dry stars . Calculation shows that this gas annually comes from stars in their surroundings very much.'