আপনি জানেন কি?

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4 years ago

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আগে জানতাম না,এখন জানলাম। good article bro

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4 years ago

thanks!

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4 years ago

Articles nai

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4 years ago

kiser?

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4 years ago

That's a lot of mass!!! I didn't know neutron stars were this heavy 😮

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4 years ago

haa!

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4 years ago