The characteristics of the parent star-forming environment can influence the detailed properties of individual stars, notably the extent and density of surviving protoplanetary discs. Thus, the relative proportion of star formation occurs in a wide range of environments, from dense, active star-forming...
How Do Stars Form in Nebulas?Stars are born in clouds of gas and dust. One such stellar nursery is the Orion Nebula, an enormous cloud of gas and dust many light-years across. Turbulence from deep within these clouds creates high density regions called knots. Are stars bigger than nebula?
How many stars are there in the universe?(不需要准确数字)Where do they come from and where do they go to?What is the most common chemical element in the universe?How are all the other chemical elements formed?Define the terms:Galaxy,nebula,black hole,supernova,comet,asteroid,meteorite(这题...
The protostar is basically a baby star, and grows into a star through its life cycle in the same way as we are born and grow.The main process of all stars' birth is called Nuclear Fusion. Nuclear Fusion happens in very large clouds on gas called nebula. When nuclear fusion starts in ...
There was no solar system, only a giant, rotating cloud of particles called the solar nebula. To figure out how all that leftover gas and dust led to planets, astronomers have largely studied the structure of our own solar system for clues. They've also looked to distant, younger solar ...
If you look up at a clear sky at night, you will see that some stars appear to be winking in and out very quickly. This is referred to as 'twinkling.' However, stars themselves do not actually twinkle, and this phenomenon has a clear scientific explanation....
A good number of the elements on the periodic table are produced inside these giant stars near the end of their lives. But once these stars form an iron core, the music stops and the party's over. All that material surrounding the iron squeezes in on the core, but iron fusion doesn...
Star-forming regions in space like the Orion Nebula pictured here are home to budding stars. Ultraviolet light from these young stars carves a cavity in the emission nebula.(Image credit: NASA, ESA, M. Robberto (STScI/ESA) and the Hubble Space Telescope Orion Treasury Project Team) ...
Ch 14. Formation & Evolution of Stars Ch 15. Stellar Death & Remnants Ch 16. Formation & Structure of the Milky... Ch 17. Properties & Characteristics of... Ch 18. Relativity in Space & Time Ch 19. Overview of Life in the Universe Ch 20. Studying for Astronomy 101 Ch 21. Required...
Stars live very different lives depending on the masses they have when they form. For some stars, live is bright, but short, while others last much longer.