Переплетенные и извивающиеся нити светящегося газа дали туманности название Медуза. Также известная как Abell 21, эта старая планетарная туманность находится примерно в 1500 световых годах от нас в созвездии Близнецов. Туманность представляет собой финальную стадию эволюции звезд малой массы, как наше Солнце, которые переходят от красных гигантов к белым карликам, сбрасывая внешние слои. Ультрафиолетовое излучение горячей звезды питает свечение туманности. Туманность Медузы простирается более чем на 4 световых года.
Переплетенные и извивающиеся нити светящегося газа дали туманности название Медуза. Также известная как Abell 21, эта старая планетарная туманность находится примерно в 1500 световых годах от нас в созвездии Близнецов. Туманность представляет собой финальную стадию эволюции звезд малой массы, как наше Солнце, которые переходят от красных гигантов к белым карликам, сбрасывая внешние слои. Ультрафиолетовое излучение горячей звезды питает свечение туманности. Туманность Медузы простирается более чем на 4 световых года.
What distinguishes the app from competitors is its use of what's known as channels: Public or private feeds of photos and videos that can be set up by one person or an organization. The channels have become popular with on-the-ground journalists, aid workers and Ukrainian President Volodymyr Zelenskyy, who broadcasts on a Telegram channel. The channels can be followed by an unlimited number of people. Unlike Facebook, Twitter and other popular social networks, there is no advertising on Telegram and the flow of information is not driven by an algorithm. But Kliuchnikov, the Ukranian now in France, said he will use Signal or WhatsApp for sensitive conversations, but questions around privacy on Telegram do not give him pause when it comes to sharing information about the war. Right now the digital security needs of Russians and Ukrainians are very different, and they lead to very different caveats about how to mitigate the risks associated with using Telegram. For Ukrainians in Ukraine, whose physical safety is at risk because they are in a war zone, digital security is probably not their highest priority. They may value access to news and communication with their loved ones over making sure that all of their communications are encrypted in such a manner that they are indecipherable to Telegram, its employees, or governments with court orders. It is unclear who runs the account, although Russia's official Ministry of Foreign Affairs Twitter account promoted the Telegram channel on Saturday and claimed it was operated by "a group of experts & journalists." Telegram has become more interventionist over time, and has steadily increased its efforts to shut down these accounts. But this has also meant that the company has also engaged with lawmakers more generally, although it maintains that it doesn’t do so willingly. For instance, in September 2021, Telegram reportedly blocked a chat bot in support of (Putin critic) Alexei Navalny during Russia’s most recent parliamentary elections. Pavel Durov was quoted at the time saying that the company was obliged to follow a “legitimate” law of the land. He added that as Apple and Google both follow the law, to violate it would give both platforms a reason to boot the messenger from its stores.
from es
