stars live wallpaper

witness stars live wallpaper on your android screen. get this planets live wallpaper free and stars and planets wallpaper now. look up in the night sky and you’ll see lots of stars. but what is a star. in a scientific sense, lwp, live wallpaper, a star is ball of hydrogen and helium with enough mass that it can sustain nuclear fusion at its core. our sun is a star, of course, but they can come in different sizes and colors. so let’s learn what a star is. 75% of the matter in the universe is hydrogen and 23% is helium; these are the amounts left over from the big bang. these elements exist in large stable clouds of cold molecular gas. at some point a gravitational disturbance, like a supernova explosion or a galaxy collision will cause a cloud of gas to collapse, beginning the process of star formation. as the gas collects together, it heats up. conservation of momentum from the movement of all the particles in the cloud causes the whole cloud to begin spinning. most of the mass collects in the center, but the rapid rotation of the cloud causes it to flatten out into a protoplanetary disk. this is indeed hd space backgrounds and space free live wallpaper.

it’s out of this disk that planets will eventually form, but that’s another story. the protostar at the heart of the cloud heats up from the gravitational collapse of all the hydrogen and helium, and over the course of about 100,000 years, it gets hotter and hotter becoming a t tauri star. finally after about 100 million years of collapse, temperatures and pressures at its core become sufficient that nuclear fusion can ignite. retina wallpapers. from this point on, the object is a star. nuclear fusion is what defines a star, but they can vary in mass. feel these animated space wallpapers and andromeda, asteroid dust picture on your phone. and the different amounts of mass give a star its properties. the least massive star possible is about 75 times the mass of jupiter. in other words, if you could find 74 more jupiters and mash them together, you’d get a star. the most massive star possible is still an issue of scientific disagreement, but it’s thought to be about 150 times the mass of the sun. more than that, and the star just can’t hold itself together.

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