These massive columns of gas and dust clouds are bustling with star-forming activity. Looking Ahead As stars live and die, they enrich the interstellar medium with heavier elements, ensuring that the next generation of stars and planetary systems have the ingredients necessary for complex chemistry...
How to identify the youngest protostarsStamatellosD.WhitworthA.P.BoydD.F.A.GoodwiningentaconnectAstronomy & Astrophysics Berlin
Slow-spinning clouds could have formed elliptical galaxies. Cooling: High-density protogalactic clouds cooled faster, using up all the gas and dust in forming stars and leaving none for making a galactic disk (this is why elliptical galaxies don't have disks). Low-density protogalactic clouds ...
Evolution of Stars: The birth of a star occurs to the gravitational effects on nebulae. The dust and gas in a nebula begin to clump together in spots of larger gravitational pull. As more and more gas and dust gather, protostars are formed, and as these protostars reach...
The Wilson Effect states that sunspots are depressions on the Sun’s surface. The Zeeman effect, on the other hand, show that prototypical sunspots come in pairs with contrasting magnetic polarity. In each cycle, sunspots change from north to south and from south to north and back. They appe...
–How many galaxies are there? –Hubble’s law: Why are most galaxies moving away from us? –How black holes and galaxies play tug-of-war across the cosmos As the gas collapsed and its density increased, some stars formed very early on, before the gas had stabilised into a rotating disc...
We investigate the effect of circumstellar disks on the dynamical evolution of a small cluster of protostars formed by 'prompt initial fragmentation'. In particular we study how the presence of disks affects the resultant mass components of binaries formed in the cluster. We find that when the ...
Planetary Systems are formed by origin and evolution. They come from protoplanetary disks that form around stars as part of the process of star formation. During the process, material is gravitationally scattered into orbits. But how do planetary systems work? Planets in the solar system revolve ...
supermassive stars. In early Universe which is still little enriched with heavy elements, stellar winds are typically weak and the stellar collision products will retain most of their mass. At the ends of their lives, these collisionally formed supermassive stars collapse and ...
protosun's interior. When this happened, the energy released by these reactions stopped the contraction, and a large amount of light energy was radiated into space. The protosun had become a star. Nuclear reactions continue to the present day in the interior of the Sun and are the source ...