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Ho’oleilana
After the Big Bang, the matter in the universe was almost evenly distributed, like a great sea of particles. Gravity tried to put this matter together to form galaxies. But when matter came together, it got very hot, and that heat caused matter to push outward. Thus a kind of chain of «bounces» was created:…
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Be-type star
Be stars are young, massive, very hot stars with a high rotation speed that have a disk-shaped envelope around them, generated by material ejected from the star itself.
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Active Galactic Nucleus (AGN)
Astronomers think that virtually every large galaxy in the Universe harbors a supermassive black hole at its center, with millions of times the mass of our Sun. The black hole itself cannot be observed with telescopes, but we can see the material that is approaching it before falling irretrievably into its interior.
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Stellar stream from the Sagittarius Dwarf galaxy
The tidal forces caused by the Milky Way on Sagittarius are causing its gradual dismemberment. In the sky we can see arc-shaped structures that are the trails of stars that are being torn from the dwarf galaxy.
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Local Group of galaxies
Our galaxy, the Milky Way, is bound by gravity to other nearby galaxies, forming the Local Group. It has a diameter of about 10 million light years.
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The Coma galaxy cluster
Galaxy Clusters Galaxy clusters are groups of hundreds of galaxies that are bound together by the force of gravity in a region of space. At the center of a cluster there is usually a huge elliptical galaxy, so massive that its gravitational pull helps keep the rest of the galaxies in the cluster orbiting around…
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The Milky Way and its Halo
The Milky Way The Milky Way is the galaxy in which we live. It is a spiral galaxy, and three main structures can be distinguished in it: the central bulge, the disk with spiral arms, and the halo, a sphere that completely surrounds the disk and the bulge. The disk has an approximate diameter of…
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The Milky Way
Our Galaxy The Milky Way is the galaxy we live in. It is of the spiral type and three main structures can be distinguished: the central bulb, the disk with spiral arms and the halo, a sphere that completely surrounds the disk and the bulb. The disk has an approximate diameter of about 100,000 light-years…
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Laniakea and the Cosmic Web
The Cosmic Web The Cosmic Web is a huge and complex network of filaments of dark matter, gas and galaxies, with clusters and superclusters of galaxies inside the points where several of these filaments meet. The filament structure also leaves large empty spaces, which are called ‘voids’. The model In this 3D model we see…
