воскресенье, 17 марта 2019 г.

Cilia! Image of the Week – March 18, 2019CIL:11620 -…


Cilia! Image of the Week – March 18, 2019


CIL:11620http://www.cellimagelibrary.org/images/11620


Description: Figure 317 from Chapter 13 (Cilia and Flagella) of ‘The Cell’ by Don W. Fawcett M.D. The inconsistent orientation of the cilia in scanning micrographs does not accurately reflect their state in the living cell. All of the cilia on a cell would normally be in the same phase of their cycle of beating. Routine methods of fixation are incapable of instantly immobilizing them in the attitude typical of their effective stroke or recovery phase. They therefore tend to come to rest in a more or less straight neutral position. 


Authors: Don W. Fawcett and Penelope Gaddum-Rosse


Licensing: Attribution Non-Commercial No Derivatives: This image is licensed under a Creative Commons Attribution, Non-Commercial, No Derivatives License


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2019 March 17 M106: A Spiral Galaxy with a Strange Center Image…


2019 March 17


M106: A Spiral Galaxy with a Strange Center
Image Credit: NASA, ESO , NAOJ, Giovanni Paglioli; Assembling and Processing: R. Colombari and R. Gendler


Explanation: What’s happening at the center of spiral galaxy M106? A swirling disk of stars and gas, M106’s appearance is dominated by blue spiral arms and red dust lanes near the nucleus, as shown in the featured image. The core of M106 glows brightly in radio waves and X-rays where twin jets have been found running the length of the galaxy. An unusual central glow makes M106 one of the closest examples of the Seyfert class of galaxies, where vast amounts of glowing gas are thought to be falling into a central massive black hole. M106, also designated NGC 4258, is a relatively close 23.5 million light years away, spans 60 thousand light years across, and can be seen with a small telescope towards the constellation of the Hunting Dogs (Canes Venatici).


∞ Source: apod.nasa.gov/apod/ap190317.html


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