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📡 مقایسه‌ای از ابعادِ سیارات داخلی منظومهٔ خورشیدی؛ عطارد (تیر)، ناهید (زُهره)، زمین و مریخ.

یک بار حرکت زمین به دور خود حدود ۲۳.۹ ساعت طول می‌کشد، مریخ ۲۴.۶ ساعت، سیارهٔ ناهید ۲۴۳ روز (در خلاف جهت گردش بقیهٔ سیارات)، سیارهٔ عطارد ۵۹ روز. 🌐

یک #واحد_نجومی برابر است با فاصلهٔ زمین–خورشید: ۱۴۹.۶ میلیون کیلومتر.

قُطرها (کیلومتر)— زمین: ۱۲۷۵۶، مریخ: ۶۷۹۲، ناهید: ۱۲۱۰۴ و عطارد: ۴۸۷۹.

سرعت فرار از گرانش سیاره‌ها (معادل است با کمترین سرعتی که بتوان از سیاره خارج و به فضایِ بیرون رفت)— سرعت به کیلومتر بر ثانیه: زمین: ۱۱.۲، مریخ: ۵، ناهید: ۱۰.۴ و عطارد: ۴.۳. — 🌐

🛰 @TechX

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📡 مقایسه‌ای از ابعادِ سیارات داخلی منظومهٔ خورشیدی؛ عطارد (تیر)، ناهید (زُهره)، زمین و مریخ.

یک بار حرکت زمین به دور خود حدود ۲۳.۹ ساعت طول می‌کشد، مریخ ۲۴.۶ ساعت، سیارهٔ ناهید ۲۴۳ روز (در خلاف جهت گردش بقیهٔ سیارات)، سیارهٔ عطارد ۵۹ روز. 🌐

یک #واحد_نجومی برابر است با فاصلهٔ زمین–خورشید: ۱۴۹.۶ میلیون کیلومتر.

قُطرها (کیلومتر)— زمین: ۱۲۷۵۶، مریخ: ۶۷۹۲، ناهید: ۱۲۱۰۴ و عطارد: ۴۸۷۹.

سرعت فرار از گرانش سیاره‌ها (معادل است با کمترین سرعتی که بتوان از سیاره خارج و به فضایِ بیرون رفت)— سرعت به کیلومتر بر ثانیه: زمین: ۱۱.۲، مریخ: ۵، ناهید: ۱۰.۴ و عطارد: ۴.۳. — 🌐

🛰 @TechX
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Telegram and Signal Havens for Right-Wing Extremists

Since the violent storming of Capitol Hill and subsequent ban of former U.S. President Donald Trump from Facebook and Twitter, the removal of Parler from Amazon’s servers, and the de-platforming of incendiary right-wing content, messaging services Telegram and Signal have seen a deluge of new users. In January alone, Telegram reported 90 million new accounts. Its founder, Pavel Durov, described this as “the largest digital migration in human history.” Signal reportedly doubled its user base to 40 million people and became the most downloaded app in 70 countries. The two services rely on encryption to protect the privacy of user communication, which has made them popular with protesters seeking to conceal their identities against repressive governments in places like Belarus, Hong Kong, and Iran. But the same encryption technology has also made them a favored communication tool for criminals and terrorist groups, including al Qaeda and the Islamic State.

📡 مقایسه‌ای از ابعادِ سیارات داخلی منظومهٔ خورشیدی؛ عطارد (تیر)، ناهید (زُهره)، زمین و مریخ.

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