Hydrologic
Fision
Nuclear fusion
Cold fusion

2. The lifespan of a star depends on what factor?

the size
the brightness
the heat
all of the above

3. Are the largest telescopes refractors of reflectors?

Refractor
Reflectors

4. What is the brightess star in the night sky?

Sirius
Algol
Polaris
Pleiades

5. What is the name of the North Star?

Alpha Centauri
Sagitta
Sirius
Polaris

6. What is the closest star to the sun?

Polaris
Sirius
Alpha Centauri
None of the above

7. What is the name of the European space probe that photographed Hally's Comet in 1986?

Giotto
Magellan
Galileo
Voyager 2

8. Which space probe flew past the planets Jupiter, Saturn, Uranus, and Neptune?

Hubble Space Telescope
Voyager 2
Magellan
Galileo

9. What are the three different types of star galaxies?

Spiral, Elliptical, and Rectangular
Spiral, Elliptical, Irregular bar shaped
Spiral, Rectangular,Irregular bar shaped
Elliptical, Rectangular,Irregular bar shaped

10. Interstellar matter consists 90% of what element?

carbon
helium
neon
hydrogen