The researchers from the Sloan Digital Sky survey have reported most detailed look at the warp of our home галактика
Зазвичай згадується спіраль галактики as a flat disc rotating around its centre but about 60-70% of the spiral galaxies including our home галактика Milky Way have discs with a slight warp or twist.
Про викривлення чи скручування в нашому домі було мало відомо галактика через положення Сонячної системи всередині Чумацького Шляху
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 Всесвіт, after carefully studying the positions and motions of Число зірок: 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 галактика 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 Число зірок: to move up and down. The twist or the warp is continuing gravitational ripple passing through the галактика caused most likely due to interaction with the satellite галактика about 3 billion years ago.
Interestingly, our home галактика 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.
***
джерела:
Огляд цифрового неба Sloan 2021. Прес-реліз – Чумацький Шлях робить хвилю. Опубліковано 15 січня 2021 р. Доступно в Інтернеті за адресою https://www.sdss.org/press-releases/the-milky-way-does-the-wave/
***
