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📡🎥 مدارگرد خورشید #پارکر با کمک گرفتن از گرانش سیارهٔ ناهید [Venus] مدارِ گردشِ خود به دور خورشید را تنظیم می‌کند. به دلیل دمای بسیار بالا، مدار فضاپیما کاملا بیضوی‌ست تا مدت زمان طولانی در معرض تابش‌های خورشیدی قرار نگیرد.

طراحی مدار فضاپیما به گونه‌ای تنظیم شده تا هفت بار از گرانش سیارهٔ ناهید استفاده کند؛ سرعت مداری فضاپیما در بازهٔ گذر از نزدیک‌ترین فاصله به خورشید حدود ۲۰۰ کیلومتر بر ثانیه خواهد بود. این سرعت تقریبا معادل ۰.۰۶۴ ٪ سرعت نور است و فضاپیما رو سریع‌ترین سازهٔ ساخت بشر می‌کند.

فضاپیما آخرین بار در ۲ اسفند ۱۳۹۹ برای چهارمین بار از گرانش سیارهٔ ناهید برای تغییر مدار استفاده کرد. ویدئویِ این پست دینامیک مداری فضاپیما رو طی مأموریت ۷ ساله نشان می‌دهد. — 🌐 — [پست قبل: 🔗]

🛰 @TechX

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📡🎥 مدارگرد خورشید #پارکر با کمک گرفتن از گرانش سیارهٔ ناهید [Venus] مدارِ گردشِ خود به دور خورشید را تنظیم می‌کند. به دلیل دمای بسیار بالا، مدار فضاپیما کاملا بیضوی‌ست تا مدت زمان طولانی در معرض تابش‌های خورشیدی قرار نگیرد.

طراحی مدار فضاپیما به گونه‌ای تنظیم شده تا هفت بار از گرانش سیارهٔ ناهید استفاده کند؛ سرعت مداری فضاپیما در بازهٔ گذر از نزدیک‌ترین فاصله به خورشید حدود ۲۰۰ کیلومتر بر ثانیه خواهد بود. این سرعت تقریبا معادل ۰.۰۶۴ ٪ سرعت نور است و فضاپیما رو سریع‌ترین سازهٔ ساخت بشر می‌کند.

فضاپیما آخرین بار در ۲ اسفند ۱۳۹۹ برای چهارمین بار از گرانش سیارهٔ ناهید برای تغییر مدار استفاده کرد. ویدئویِ این پست دینامیک مداری فضاپیما رو طی مأموریت ۷ ساله نشان می‌دهد. — 🌐 — [پست قبل: 🔗]

🛰 @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.

📡🎥 مدارگرد خورشید #پارکر با کمک گرفتن از گرانش سیارهٔ ناهید [Venus] مدارِ گردشِ خود به دور خورشید را تنظیم می‌کند. به دلیل دمای بسیار بالا، مدار فضاپیما کاملا بیضوی‌ست تا مدت زمان طولانی در معرض تابش‌های خورشیدی قرار نگیرد.

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With Telegram, you can send messages, photos, videos and files of any type (doc, zip, mp3, etc), as well as create groups for up to 200,000 people or channels for broadcasting to unlimited audiences. You can write to your phone contacts and find people by their usernames. As a result, Telegram is like SMS and email combined — and can take care of all your personal or business messaging needs. In addition to this, we support end-to-end encrypted voice calls.

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Q: Can I make calls via Telegram?

Yes! Voice calls are currently available to users around the world.

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