1. Which scientist was the first to use the telescope in astronomy?

2. Stellar distances are usually expressed in what units?

3. What was the first space telescope built by NASA?

4. Our galaxy is called the ____.

5. What astronomer was the first to use mathematical data to describe the motion of the stars and planets?

6. What is an arbitrary grouping of stars that form a picture in the night sky?

7. What is a group of stars within a constellation that have a recognizable shape of their own?

8. What is the term for the imaginary sphere we picture surrounding Earth upon which the stars are fixed?

9. During the period that the moon’s phases are changing from new to full, the moon is ____.

10. What occurs when the moon casts its shadow on Earth?

11. What moon phase must happen for a solar eclipse to occur?

12. Round depressions on the moon’s surface are called ____.

13. What are white lines of debris that come out of craters?

14. Which American space mission was the first to have men walk on the moon?

15. Which Apollo mission was termed a “successful failure” for its failure in landing on the moon but successfully getting the astronauts home?

16. What American was the first person to ever set foot on the moon?

17. The imaginary line that the sun traces through the sky each day is the _____.

18. The point directly overhead above an observer is called the _____.

19. Our north star is currently ________.

20. The first day of spring when day and night are of equal length is the ____.

21. The longest day of the year occurs on the _______.

22. The shortest day of the year occurs on the _______.

23. The first day of fall is the ______.

24. __________ states that Earth was the center of the universe.

25. Using Tycho Brahe’s data, which scientist proposed three laws of planetary motion?

26. The first early astronomer to propose a sun-centered solar system was ____.

27. Which scientist discovered that Venus has phases, just like the moon?

28. What is the shape of a planet’s orbit?

29. Which scientist determined the nature of the forces that keep the planets in their orbits?

30. The true shape of planetary orbits was discovered by ____.

31. Which astronomer spent 20 years plotting the positions of the planets?

32. What movement of Earth is responsible for night and day?

33. Seasons are caused by ____.