انجمن علمی ستاره‌شناسى | United States America (US)

Create: 2023-05-26 Update: 2025-07-01 15:10:34

‏احتمال انتقال آب توسط سیارک ها

🔸️ با توجه به فراوانی دوتریوم به هیدروژن در زمین(دوتریوم ایزوتوپ هیدروژن است)، باور بر این است که آب،از طریق سیارک ها به سیاره زمین آمده است.

🔹️حال جیمز وب با رصد دنباله دار 238P اولین بار شواهدی رو به دست آورده که آب توسط “دنباله دارهایی که در مدارسیارک ها “اسیرشده اند به زمین آمده است.

🔸️ ‏نکته جالب،عدم حضور کربن دی اکسید درطیف نشری این دنباله دار است(عکس دوم ومقایسه طیف نشری این دنباله دار با دنباله دار هارتلی).

🔹️ خواستگاه دنباله دارها،ابر Oort و کمربند کوییپر است امادسته تازه ایی ازدنباله دارها هستند که در کمربند سیارک ها قرار دارند.

منبع: https://www.nature.com/articles/s41586-023-06152-y

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Walmart arrives on Roblox for the first time with two new virtual worlds to engage young shoppers

Walmart announced today that it is stepping into the metaverse with two new experiences on Roblox: “Walmart Land” and “Universe of Play.” The virtual worlds are aimed at younger Walmart customers and let Roblox players collect new virtual merchandise, play games featuring toys and characters, earn toys from a blimp, attend live concerts, win fashion competitions and more.

‏احتمال انتقال آب توسط سیارک ها

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