The universe is an endless expanse of space, filled with billions of galaxies, stars, planets, and cosmic phenomena. It holds mysteries beyond human imagination, from black holes to dark matter. Scientists believe it began with the Big Bang around 13.8 billion years ago. The universe continues to expand, revealing new insights through advanced telescopes and space missions. It remains one of the greatest frontiers of exploration and curiosity.

Refrences:

https://peatix.com/event/4446629/view

https://multiurok.ru/blog/everything-you-need-to-know-about-oxygen-cylinders-types-uses-and-safety.html

https://ronorp.net/market/posts/3571597?city=zurich-en