The Hipparcos mission's observations have given us good data on stars out to about:
A) 100 light years.
B) 200 light years.
C) 200 parsecs.
D) 1000 light years.
E) 1000 parsecs.
Question 2
As a star evolves, heavier elements tend to form by various processes. Which of the following is NOT one of these processes?
A) proton capture and neutron capture
B) fusion of like nuclei
C) helium capture
D) the s process
E) neutronization