Back to Article List From the July 2009 issue Ask Astro web extra: What is the nearest star to the Sun? How far away is it? Associate Editor Daniel Pendick talks about Proxima Centauri. By Astronomy Staff | Published: July 27, 2009 | Last updated on May 18, 2023 Key Takeaways:
Solar System Before spacecraft, how did astronomers determine the mass, size, and composition of the giant planets?
