The researchers from the Sloan Digital Sky survey have reported most detailed look at the warp of our home ছায়াপথ
সাধারণত, এক সর্পিল চিন্তা ছায়াপথ as a flat disc rotating around its centre but about 60-70% of the spiral galaxies including our home ছায়াপথ Milky Way have discs with a slight warp or twist.
আমাদের বাড়িতে ওয়ার্প বা টুইস্ট সম্পর্কে তেমন কিছু জানা ছিল না ছায়াপথ মিল্কিওয়ের মধ্যে সৌরজগতের অবস্থানের কারণে
The researchers of the Sloan Digital Sky Survey (SDSS), a consortium of several research organisations dedicated to creation of most detailed 3-dimensional maps of the বিশ্ব, after carefully studying the positions and motions of নক্ষত্র all over the Milky Way have traced out the warp. They have reported findings that the Milky Way’s disc is warped and the wrap travels around the ছায়াপথ once every 440 million years.
The analysis showed that the twist or the warp is caused by the ripple or the wave travelling through the Milky Way causing individual নক্ষত্র to move up and down. The twist or the warp is continuing gravitational ripple passing through the ছায়াপথ caused most likely due to interaction with the satellite ছায়াপথ about 3 billion years ago.
Interestingly, our home ছায়াপথ Milky Way is expected to collide with the Andromeda galaxy in about 4 billion years from now when both the galaxies will merge with each other.
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সোর্স:
The Sloan Digital Sky Survey 2021. প্রেস রিলিজ – The Milky Way Dos the Wave. 15 জানুয়ারী 2021 প্রকাশিত। অনলাইনে উপলব্ধ https://www.sdss.org/press-releases/the-milky-way-does-the-wave/
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