Space

3. the time or date (twice each year) at which the sun reaches its maximum or minimum declination, marked by the longest and shortest days (about June 21 and December 22)
9. each of the aspects of the moon or a planet, according to the amount of its illumination, especially the new moon, the first quarter, the full moon, and the last quarter
10. the planet on which we live
12. an elongated rocket-propelled missile or spacecraft
14. the branch of science which deals with celestial objects, space, and the physical universe as a whole
15. the study of the movements and relative positions of celestial bodies interpreted as having an influence on human affairs and the natural world
17. an artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication
18. a small rocky body orbiting the sun
19. the physical universe beyond the earth's atmosphere

1. a group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure
2. a fixed luminous point in the night sky which is a large, remote incandescent body like the sun
4. the path of a planet around a star
5. the time or date (twice each year) at which the sun crosses the celestial equator, when day and night are of approximately equal length (about September 22 and March 20)
6. a region of space having a gravitational field so intense that no matter or radiation can escape
7. a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
8. a cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter
11. he shadow cast by the earth or moon over an area experiencing a partial eclipse
13. representation of the signs of the zodiac or of a similar astrological system
14. a person who is trained to travel in a spacecraft
16. system the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets