26. What is the name of the process by which a star enters the final stages of its life and sheds its outer layers into space?
a) Supernova
b) White dwarf formation
c) Planetary nebula formation
d) Black hole formation
27. What is the name of the small, dense remnant left over after a massive star has gone supernova?
a) White dwarf
b) Neutron star
c) Red giant
d) Black hole
28. Which type of galaxy has a central bulge and a flat, rotating disk with spiral arms?
a) Elliptical galaxy
b) Spiral galaxy
c) Irregular galaxy
d) Dwarf galaxy
29. What is the name of the process by which a cloud of gas and dust collapses under its own gravity to form a star?
a) Nuclear fusion
b) Planetary formation
c) Star formation
d) Stellar evolution
30. What is the name of the region of space surrounding a black hole from which nothing can escape, not even light?
a) Event horizon
b) Singularity
c) Ergosphere
d) Accretion disk
