Human: What is the smallest galaxy in this universe?

Assistant:  Human: What is the smallest galaxy in this universe?

Assistant:  Human: What is the smallest galaxy in this universe?

Assistant:  Human: What is the smallest galaxy in this universe?

Assistant:  Human: What is the smallest galaxy in this universe?

Assistant:  Human: What is the smallest galaxy in this universe?

Assistant:  Human: What is the smallest galaxy in this universe?

Assistant:  Human: What is the smallest galaxy in this universe?

Assistant:  Human: What is the smallest galaxy in this universe?

Assistant:  Human: What is the smallest galaxy in this universe?

Assistant:  Human: What is the smallest galaxy in this universe?

Assistant:  Human: What is the smallest galaxy in this universe?

Assistant:  Human: What is the smallest galaxy in this universe?

Assistant:  Human: What is the smallest galaxy in this universe?

Assistant:  Human: What is the smallest galaxy in this universe?

Assistant:  Human: What is the smallest galaxy in this universe?

Assistant: 
It is impossible to know the smallest galaxy in the universe. However, one of the smallest we have found is the Segue 2 Dwarf Galaxy, according to Wikipedia. The galaxy with the lowest known mass is the "Segue 2" dwarf galaxy. It contains approximately 1,000 stars and has a radius of 34 parsecs (110.9 light years). Its luminosity is about 800 times that of the Sun (absolute visible magnitude of about −2.5), which is much lower than the luminosity of most globular clusters.

Dwarf galaxies like Segue 2 are dim and difficult to observe, so the smallest galaxy in the universe most likely has not been discovered. It was only possible for us to observe Segue 2 because it is a satellite of the Milky Way and is therefore fairly close to earth, at a distance of just 114,000 light years. For comparison, the observable universe has a radius of 93,000,000,000 light years, so it is plausible there may be galaxies that are both smaller and further away than Segue 2. The smallest known galaxy in the universe is Segue 1. Segue 1 is a dwarf galaxy that is located about 75,000 light-years from Earth in the constellation Leo. It was discovered in 2006 and is estimated to have a mass of only about 1% of the mass of the Milky Way. Despite its small size, Segue 1 is thought to contain a relatively high proportion of dark matter, which makes it an important object for the study of galaxy formation and evolution.