Match each definition with the correct term.
1. bright red star in Taurus
luminosity
2. constellation known as the herdsman
astrolabe
3. cluster of stars in the face of Taurus
magnitude
4. brightness of a star
nebula
5. North Star located in Ursa Minor
summer
6. telescope which uses a system of lenses
refractor telescope
7. intensity of light
Bootes
8. telescope which uses a system of mirrors
Cassiopeia
9. best viewing season for Bootes
winter
10. best viewing season for Orion
Polaris
11. a queen in Greek mythology
Aldebaran
12. early navigational instrument
Hyades
13. gigantic clouds of dust and gas in space
reflector telescope