The number of stars in galaxies can vary significantly, and precise counts are challenging due to the vastness and complexity of these structures. However, scientists have made estimates based on observations and calculations.
The Milky Way is estimated to contain approximately 100 billion to 400 billion stars. This estimate includes various types of stars, such as main-sequence stars like our Sun, as well as smaller and larger stars.
The Andromeda Galaxy, also known as M31, is the closest spiral galaxy to the Milky Way and is similar in size. It is estimated to contain about 1 trillion stars, which is roughly 2.5 times the number of stars in the Milky Way.
The Triangulum Galaxy, also known as M33, is a smaller spiral galaxy compared to the Milky Way and Andromeda. It is estimated to have around 40 billion stars, making it smaller than both the Milky Way and Andromeda in terms of stellar population.
It's worth noting that these estimates can vary depending on different studies and observations. The numbers provided here are general estimates to give you an idea of the relative sizes of the stellar populations in these galaxies.