Chandra is a sophisticated spacecraft observatory that:
a. Uses an X-ray laser to make X-rays of the stars
b. Observes X-rays from hot regions in space
c. Replaced the Hubble Space Telescope
d. Collects top secret military intelligence

Astronomy is the scientific study of
a. The Earth's upper atmosphere
b. The stars to predict our horoscope
c. Everything in the universe beyond the Earth's atmosphere
d. The economics of crop production

Which is the most accurate description of a black hole?
a. A dark cloud where stars are formed
b. A region of space where the force of gravity is so strong that nothing can escape from it
c. A totally empty region of space
d. The massive envelope of dark matter around our galaxy

Cosmologists attempt to answer questions about:
a. The structure of the universe
b. The past and future of the universe
c. How the universe evolves
d. All of the above

Dark matter is the term used to describe:
a. Unseen matter that may comprise the majority of the mass in the universe
b. Dark clouds in interstellar space
c. The blackness of space beyond Earth's atmosphere
d. Matter that absorbs all the radiation that strikes it

How long does it take light to get to the Earth from a star 36 light years away?
a. 36 years
b. 36 million years
c. 360 thousand years
d. 3.6 years
e. 8 minutes