📡 #رصد_کیهان: ۱۴ 🔗| آثاری از ۳۷۰ هزار سال پس از #بیگ

Create: 2021-02-27 Update: 2025-06-29 14:33:56

📡 #رصد_کیهان: ۱۴ 🔗| آثاری از ۳۷۰ هزار سال پس از #بیگ_‌بنگ.

دمایِ اولین نورهای کیهان از ۳۷۰۰ درجه به حدود منفی ۲۷۰ درجهٔ سانتی‌گراد (۲.۷ در مقیاس کِلوین) رسید، و طول موج‌ نور نیز به دلیل #انبساط_کیهان [🔗] از طیف مرئیِ آن زمان به امواج الکترومغناطیس تغییر کرد. در نتیجه، با آنتن‌ها و گیرنده‌های رادیویی می‌بایست این امواج قابل شناسایی باشند. این اندازه‌گیری‌ها توسط ماهواره‌های فضاییِ مخصوص با دقت بالایی ثبت شده. این نورهای اولیهٔ کیهان به «تابش زمینه کیهانی» یا CMB معروف است.

🔘 این تصویر که توسط تلسکوپ فضایی پِلانک (Planck) ثبت شده، تغییرات دماییِ نورهای اولیهٔ پس از بیگ‌بنگ است که امروزه به دلیل انبساط کیهان در طول موج رادیویی قرار دارند و در سراسر کیهان گسترده شدند. مثالی دیگر؛ وقتی تلویزیون در حالت «برفکی» قرار دارد، بخشی از این امواج رادیویی که در کیهان گسترده شده، توسط گیرنده و آنتن‌ها ثبت می‌شود! — 🌐 — [پست قبل: 🔗، پست اولِ این سری: 🔗]

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