Formation of galaxiesspiral galaxiesN-body simulationsA mechanism of formation of a spiral galaxy is proposed. The galaxy isconsidered to be a cluster consisting of stars and gaseousclouds. Initially, the galaxy has elliptical geometry and slowrotational motion around one axis. The gravitational ...
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...
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 formation of our Milky Way can be split up qualitatively into different phases that resulted in its structurally different stellar populations: the halo and the disk components1,2,3. Revealing a quantitative overall picture of our Galaxy’s assembly requires a large sample of stars with very ...
Composition of the solar system orbitsThe orbits of the planets and other bodies of the solar system. Located at the centre of the solar system and influencing the motion of all the other bodies through itsgravitationalforce is theSun, which in itself contains more than 99 percent of the mass...
ofneutron starsorblack holes, the orbital motion approaches thespeed of lightand therefore needs to be described by the theory ofrelativity. The emission from the disk displays such relativistic effects as gravitationalredshift, in which the wavelength of theemittedlightis shifted to longer ...
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] "We found that these ...
“shifted” to a different spot on the spectrum in each observation. That indicates motion. “That shift tells us the gas is moving fast, and faster all the time,” says Wheatley. “The wind is accelerating because it’s being pushed by radiation that is blasted off of the accretion dis...
The structure of the galaxy is constrained through orbital parameters derived from the observed distance, proper motions, radial velocity, and star formation history. The different orbits admitted by the large proper motion errors are investigated in relation to the tidal force exerted by an external...
orbitsThe orbits of the planets and other bodies of the solar system.(more) Located at the centre of the solar system and influencing the motion of all the other bodies through its gravitational force is the Sun, which in itself contains more than 99 percent of the mass of the system. Th...