Using plausible laws for density of the medium and accretion of matter and solving equation of motion, we find that the galaxy loses angular momentum in the course of the time. The loss of angular momentum drives the galaxy towards the centre of the cluster. Thus over a sufficiently long ...
Effects of Black Holes on the Universe:Black holes have a significant effect on the universe. They play a vital role in the evolution of galaxies, as their gravitational pull can cause stars to form, and they can also influence the motion of nearby stars and planets. Black holes also have...
The most distant galaxies detected were seen when the Universe was a scant 5% of its current age. At these times, progenitors of galaxies such as the Milky Way were about 10,000 times less massive. Using the James Webb Space Telescope (JWST) combined with magnification from gravitational lensi...
If we want to find stars still in the process of formation, we must look in places that have plenty of the raw material from which stars are assembled. Since stars are made of gas, we focus our attention (and our telescopes) on the dense and cold clouds of gas and dust that dot the...
These atomically cooled, massive protogalaxies are expected ultimately to form a direct-collapse black hole of mass 104−105M⊙.This is a preview of subscription content, access via your institution Access optionsAccess through your institution ...
Learn about elliptical, irregular, and spiral galaxies. Identify the types of galaxies and how they form, and discover images of the shapes of...
The group calculated the mass of the stars in the survey by studying the energy they radiate. They compared that number with the mass obtained by measuring the motion of the stars, which is controlled by the galaxy's gravitational pull. [Photos: When Galaxies Collide] ...
With observations of the composition of the universe at very early times, for example, in very old stars, or the interstellar medium of galaxies at high redshift, the Big Bang and the cosmological environment of the first stars can be probed. Nucleosynthesis also affects the formation and ...
Massive stars (M > 8Mʘ) are rare and evolved rapidly but they play a crucial role in the chemical and dynamical evolution of galaxies. They produce a high amount of ultraviolet photons that can ionize the surrounding medium, especially neutral hydrogen (HI). This leads to the creation...
In addition, the average motion of the outer halo stars is opposite to that of the Galaxy, whereas the inner halo rotates in the same direction4. The disk This pattern suggests that the outer halo formed from disrupted dwarf galaxies and the inner halo is a remnant of the maelstrom ...