4.6 বিলিয়ন বছর পূর্বে কেমন ছিল আমাদের সোলার সিস্টেম।4.6 billion years ago our solar system(SB#-122) শ্বেত বামন কি ? What is white dwarf?(Science Bangla - 63) LINL-https://youtu.be/fEVSseS3rnQ মহাশূন্যে মানুষ কতটা পথ পাড়ি দিয়েছে ? How many people have traveled in space(Science Bangla- 64) LINK-https://youtu.be/y1nQecrwb_U SUBSCRIBE US : https://www.youtube.com/channel/UC1qpNbR8r_miN1eJk0ZDDOw Follow Me: Facebook : https://www.facebook.com/sci.bangla Facebook page : https://www.facebook.com/ScienceBangla007/?ref=bookmarks Science Bangla link:https://www.youtube.com/channel/UC1qpNbR8r_miN1eJk0ZDDOw SCIENCE BANGLA 360 Link:https://www.youtube.com/channel/UCgAeBznUHsM1NQz-2Rs7KGg? Lone Harvest by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100409 Artist: http://incompetech.com/ Disclaimer- Some contents are used for educational purpose under fair use. Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use. MY EMAIL ID :umandal35@gmail.com THANKS FOR WATCHING,, SUBSCRIBE FOR MORE VIDEOS .