NASA’s Hubble Telescope shared amazing images from part of a large-scale census of galaxies known as the Deep Survey of the Origin of the Great Observatory (commodity). It shows many galaxies, represented by glittering dots scattered on a dark canvas, as if a handful of particles were scattered on a dark background. Twitter posts want to talk about how big our universe is. But determining this can be difficult. For any success, we first need to find out how many galaxies there are in the universe. This problem has plagued scientists for a long time. Thanks to the Hubble Deep Field in the mid-1990s, they were able to truly understand the number of galaxies for the first time.
Subsequent observations, such as Hubble’s “ultra-deep field,” revealed countless faint galaxies and led to an estimated 200 billion galaxies in the observable universe. But scientists discovered in 2016 that the universe is much more crowded. They concluded that there are at least 10 times more galaxies in the universe than previously thought.
Let’s talk about how big our universe is. ? ? ?
The Hubble ultra-deep field has led to an estimated observable universe containing at least 200 billion galaxies. However, a 2016 study showed that this number was at least 10 times lower: https://t.co/FKh3WTJlKU#DeepFieldWeek pic.twitter.com/MrxIcaYzya
-Hubble (@NASAHubble) August 3, 2021
NASA shared social media posts as part of “Deep Field Week”, a social media event during which people will share images taken by the Hubble Space Telescope to review early studies of the universe and how they follow Time evolution. Deep-field images help us understand the formation and evolution of galaxies.
Mark your calendar! ✏️
Follow us on social media to learn more about some of Hubble’s most iconic images and what they teach us about the universe and ourselves.
Learn more here: https://t.co/RKGEJyn9E5 pic.twitter.com/EJL00pzhWh
-Hubble (@NASAHubble) July 30, 2021
Going back to the 2016 study, astronomers also found that the distribution of galaxies throughout the history of the universe is uneven, which means that the significant evolution of galaxies has greatly reduced the number of galaxies through their mergers.
The decrease in the number of stars also solves another problem that has always plagued scientists before-the Albers paradox, that is, if the luminous stars are evenly distributed in the infinite universe, why the night sky is dark.
The scientists involved in this study concluded that due to the expansion of space, the dynamic characteristics of the universe, and the absorption of light by interstellar dust and gas, the human eye cannot see the starlight from galaxies.