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Hace 2 días · Black hole, cosmic body of extremely intense gravity from which nothing, not even light, can escape. It can be formed by the death of a massive star wherein its core gravitationally collapses inward upon itself, compressing to a point of zero volume and infinite density called the singularity.
Hace 3 días · A black hole is a region of spacetime where gravity is so strong that nothing, including light and other electromagnetic waves, is capable of possessing enough energy to escape it. [2] Einstein 's theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.
Hace 1 día · Introduction. Comparisons of large and small black holes in galaxy OJ 287 to the Solar System. A supermassive black hole (SMBH) is an extremely large black hole, on the order of hundreds of thousands to billions of solar masses ( M☉ ), and is theorized to exist in the center of almost all massive galaxies.
Hace 4 días · An artist’s concept of a stellar-mass black hole (right) siphoning material from a companion star (left). Much of the material forms an accretion disk around the black hole before falling inside.
Hace 2 días · Lancaster Hill and other Black Americans in the Massachusetts Bay colony, “who are detained in a state of Slavery in the Bowels of a free & Christian Country,” declared in a petition that they were born free just like the white citizens and “have never forfeited this Blessing by any compact or agreement whatever.”.
Hace 23 horas · Wyrzykowski, L. Eyer, et al. 2024, A&A, 685, L2. Detections of gravitational waves from merging black holes demonstrate that pairs of black holes more massive than 30 solar masses are relatively common in the nearby universe. Yet, the most massive black hole known to date in our Galaxy is 20 solar mass Cyg X1, with all others below or around 10 ...
Hace 23 horas · ESA's Gaia mission, the Very Large Telescope and other ground-based telescopes have discovered stellar black hole Gaia BH3. It's mass is "33 times that of our Sun," according to the European ...
