galaxies : elliptical and lenticular, cDgalaxies : evolutiongalaxies : ISMX-rays : galaxiesIf mass and angular momentum were conserved in cooling flows associated with luminous, slowly rotating elliptical galaxies, the inflowing hot gas would spin up, resulting in disks of cold gas and X-ray ...
In other galaxies, however, the motions of stars have a greater degree of randomness, with their orbits adopting a wide variety of velocities and angles relative to the plane of their galaxy. In elliptical galaxies, this is often easy to explain: It's the result of a major galaxy merger ...
Why are elliptical galaxies red? Why do gas planets have different colors? Why do planets revolve around the sun? Why are dwarf planets important to astronomy? Why does Jupiter have so many moons? What distinguishes a nebula and a star? How does the planetary nebula shine? Why do gas plane...
You're probably familiar with the concept of comets, but what you might not know is what makes a comet different from an asteroid. It's not just that comets have a tail that makes them different from an asteroid; it's their composition. While both asteroids and comets have roc...
Elliptical orbits are the result of multiple forces acting upon a body in motion. When the Earth soon comes closer to Mars than in 60K years they will interact and the result will be measureable. , though we will feel nothing. Telescopes show that all gala...
large black holes), a black hole would have grown well past the intermediate stage by now. They also suggest that if intermediate-sized black holes do exist, they might reside in dense parts of the sky, which would make them very hard to spot. But such problems might be overcome soon, ...
In young systems, you’ll have planets as large as the Earth, or even larger, with “dirty” neighborhoods, wereas in old systems, smaller and smaller bodies get their orbits cleaned up. Ceres might well become a planet some day, without changing the least bit. –Furthermore, due to ...
A rogue black hole.Once in a while, one of these creeps wanders into a solar system uninvited and wreaks havoc. Even without passing close to the Earth, if one passed even as close as a billion miles from us, it would fling the Earth into a more strongly elliptical orbit, turning our...
IT has long been knownthat the flattest elliptical galaxies observed are of type E7, corresponding to an axial ratio of 3.33:1 whereas SO and spiral galaxies are seen with axial ratios up to 20:1. We show, using Maclaurin spheroid models, that an initially spherical protogalaxy, composed ...
WHY THERE ARE NO ELLIPTICAL GALAXIES MORE FLATTENED THAN E7. THIRTY YEARS LATERdoi:10.2298/SAJ0673013CR. CaimmiNational Library of SerbiaR. Caimmi, Why There Are No Elliptical Galaxies More Flattened Than E7. Thirty Years Later, Serbian Astronomical Journal, 173 (2006), 13-33....