Create: 2021-06-02 Update: 2025-07-02 21:15:19

📡 حدود ۵۰ هزار سال پیش سیارکی به ابعادِ تقریبی ۳۰–۵۰ متر به آمریکای شمالی برخورد کرد؛ جابه‌جایی ۱۷۵ میلیون تُن خاک، ایجاد گودالی به پهنای ۱.۲ کیلومتر و عمق ۱۸۰ متر، باقی‌ماندهٔ این برخورد بود. در آن زمان، حیوانات عظیمی همچون ماموت‌ها حکمرانی می‌کردند. این منطقه، در ایالت آریزونا قرار دارد.

تصویرِ این دهانهٔ برخوردی توسط ماهوارهٔ Landsat 8 (متعلق به ناسا) در ۲۶ اردیبهشت ۱۴۰۰ ثبت شده. رنگِ سفیدِ اطراف گودال ناشی از موادی همچون سنگ آهک و ماسه‌سنگ است. حالت مربعی گودال نیز به‌خاطر ساختار و زاویهٔ برخورد سیارک به زمین است. —🌐— #رصد_زمین، [پست قبل: 🔗]

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How to Create Telegram Channels on Mobile and Web

Telegram channels allow you to host a large audience and to share information with them. An unlimited number of subscribers can join a Telegram channel. In this step-by-step guide, we will show you how to create Telegram channels on mobile and on the web. We’ll also tell you about the difference between Telegram groups and channels, how to add people to your channel, and some admin controls that you’ll need.

📡 حدود ۵۰ هزار سال پیش سیارکی به ابعادِ تقریبی ۳۰–۵۰ متر به آمریکای شمالی برخورد کرد؛ جابه‌جایی ۱۷۵ میلیون تُن خاک، ایجاد گودالی به پهنای ۱.۲ کیلومتر و عمق ۱۸۰ متر، باقی‌ماندهٔ این برخورد بود. در آن زمان، حیوانات عظیمی همچون ماموت‌ها حکمرانی می‌کردند. این منطقه، در ایالت آریزونا قرار دارد.

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