How many estimated additional solar systems are there in our galaxy?

The estimate of around 100 billion additional solar systems in our galaxy is based on astronomical observations and mathematical modeling. Research, particularly from the Kepler Space Telescope, has revealed that many stars host their own planetary systems. Given that our Milky Way galaxy is believed to contain approximately 100 to 400 billion stars, the estimate that there are about 100 billion solar systems reflects the likelihood that a substantial number of these stars have at least one or more planets orbiting them.

This figure aligns with the findings from exoplanet research, which indicates that many, if not most, stars in our galaxy could potentially house planets. The estimate serves as an indication of the vastness of our galaxy and the potential for discovering new worlds, further fueling scientific interest in space exploration and the search for extraterrestrial life.

In contrast, options that suggest a significantly lower or higher estimate do not align well with the cumulative data gathered from various astronomical studies. The scientific consensus favors the figure closer to 100 billion, making it a well-supported estimation among astronomers.