The researchers from the Sloan Digital Sky survey have reported most detailed look at the warp of our home کہکشاں
عام طور پر، ایک سرپل کے بارے میں سوچتا ہے کہکشاں as a flat disc rotating around its centre but about 60-70% of the spiral galaxies including our home کہکشاں Milky Way have discs with a slight warp or twist.
ہمارے گھر میں تنے یا موڑ کے بارے میں زیادہ نہیں معلوم تھا۔ کہکشاں آکاشگنگا کے اندر نظام شمسی کی پوزیشن کی وجہ سے
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 کائنات, after carefully studying the positions and motions of ستاروں 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 کہکشاں 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 ستاروں to move up and down. The twist or the warp is continuing gravitational ripple passing through the کہکشاں caused most likely due to interaction with the satellite کہکشاں about 3 billion years ago.
Interestingly, our home کہکشاں 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.
***
ذرائع کے مطابق:
سلوان ڈیجیٹل اسکائی سروے 2021۔ پریس ریلیز - آکاشگنگا لہر کرتا ہے۔ 15 جنوری 2021 کو شائع ہوا۔ آن لائن دستیاب ہے۔ https://www.sdss.org/press-releases/the-milky-way-does-the-wave/
***
