Supermassive Black Holes in the Centers of Galaxies

Ғылым және технология

Darshan Kakkad, Space Telescope Science Institute
Most galaxies have a supermassive black hole at their center, including our Milky Way. Despite being surrounded by a galaxy that is 1,000 times heavier, these black holes are no mere ornament-they help determine how galaxies are going develop over time. Join Dr. Kakkad for an overview of black holes across a phenomenal range of different masses and to explore how supermassive black holes may decide the fate of galaxies.
- News from the Universe starts at 4:01
- Main talk starts at 14:25
Host: Frank Summers
Recorded live on Tuesday, February 7, 2023
More information: www.stsci.edu/public-lectures

Пікірлер: 6

  • @W-H-O
    @W-H-O Жыл бұрын

    4:03 News from the Universe 14:24 Supermassive Black Holes in the Centers of Galaxies

  • @russellfrizzell4407
    @russellfrizzell4407 Жыл бұрын

    That picture is not the same John Michell who first proposed dark stars.

  • @you2tooyou2too
    @you2tooyou2too Жыл бұрын

    . re. 22:40 'This whole star formation takes tens of thousands of years.' That sounds incredibly quick, especially including stages A & B !?! . re. 29:33 So a 'planetary nebula' is a bit like a Dyson's Sphere, far from, but surrounding the star, and capturing a significant amount of the total energy from it. Kool! ... I mean that's got to be very HOT! . re. 31:34 Why does the whole image get brighter? Surely this is a photographic trick or error in compensation, because it would have taken years for the light that took the detour thru the surrounding (but distant from our line of sight) inter-galactic material to light up the rest of the field. . re. 35:53 'Time comes to a stand-still : Frozen Stars' This seems to be a very important point, which eliminates the possibility of a 'singularity', since the infall has never (and will never) have enough 'frozen time' to fall into the center of the black hole nor join the original matter there. Even light is frozen by the (near zero?) rate of time (RoT, compared to the free-space RoT). . Even the illustration shows the effect of this slower RoT, by retarding the light 'wave front' closer to the star, causing the direction to change (in addition to, or as if by, gravity?). . BTW: The (typical but misleading) ‘trampoline’ of distorted space-time, should not go under the star as shown here, but thru the center of the star (since (obviously?) there is no ‘up’ in space, this illustration should be symmetrical (identical) if inverted. To be more accurate (if not precise), the ‘trampoline’ should be flat, but the ‘square thread matrix’ should be drawn in the distorted shape as shown, but flat thru the center of the star (getting more square again inside the star), and any parallel distortion matrix, tangent to the surface of the star should show a similar but less severe time-space stretch-to-compression distortion. . Of course, for a black hole, at or even near the Swartz.Radius, where the RoT approaches zero, there will never be enough time for any departures (nor further entry toward the misidentified, probably non-existent, ‘singularity’).

  • @tnapoli81
    @tnapoli81 Жыл бұрын

    What will happen to public lectures after 2023?

  • @marcorodrigues8303
    @marcorodrigues8303 Жыл бұрын

    O Senhor ele quer me Falir pra poder ter Todos os Controles na Mão ✋🥺 tu e o Campo de desta minha força.#

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