#gravitational — Public Fediverse posts

The #CosmicWeb is made up of large #voids delimited by long filaments of #matter at the intersection of which vast #gravitational structures are formed: #galaxies grouped into clusters.

Do their properties (mass, shape, star formation rate) preserve traces of the large-scale cosmic flows from which they originated? Find out this Thursday with Katarina Kraljic, a researcher at the @ObsStrasbourg , who studied a sample of observed and virtual galaxies : https://www.irap.omp.eu/event/the-co-evolution-of-galaxies-and-the-cosmic-web-over-cosmic-time/

#Orbital motion - there are exotic possibilities such as knife-edge #orbits, in which the #satellite can be made to execute an arbitrarily large number of nearly circular orbits, after which it flies back outward. https://en.wikipedia.org/wiki/Schwarzschild_metric#Orbital_motion

In #Einstein's theory of general #relativity, the #Schwarzschild solution is an exact solution to the Einstein field equations that describes the #gravitational field outside a spherical mass

Pictures : :cc_zero: https://commons.wikimedia.org/wiki/File:Einstein_1933.jpg https://commons.wikimedia.org/wiki/File:Schwarzschild.jpg, :ccby: :cc_sa: https://commons.wikimedia.org/wiki/File:Newton_versus_Schwarzschild_trajectories.gif