| ASTEROIDS | | NATURAL SATTELITE |
| NOVA | | HOW FAR LIGHT TRAVELS IN ONE YEAR |
| TERRESTIAL PLANET | | BENDING LIGHT |
| APPARENT MAGNITUDE | | MOTION IN THE OPPOSITE DIRECTION |
| SUMMER SOLTICE | | MERCURY, VENUS, MARS, EARTH |
| REDSHIFT | | DIRTY SNOWBALL |
| MOON | | START OF FALL |
| VERNAL EQUINOX | | LOCATION IN A PLANET'S ORBIT CLOSEST TO THE SUN |
| NEUTRON STAR | | MORE ENERGETIC |
| BLACK HOLE | | STUDY OF THE UNIVERSE |
| REFRACTION | | THE LINKING OF SEVERAL TELESCOPES |
| MARE | | ONLY VISIBLE DURING AN ECLIPSE |
| ABSOLUTE MAGNITUDE | | SPUTNIK |
| RETROGRADE MOTION | | MILKY WAY |
| GAS GIANTS | | LIKE STARS, BUT NOT |
| SOLAR WIND | | METEOR THAT REACHES THE GROUND |
| SATTELITE | | OUTER EDGE OF THE SOLAR SYSTEM CONTAINING PLUTO AND OTHER SMALL BODIES |
| EXOPLANETS | | LIKE A MIRROR |
| METEOR | | PARTICLES FLOWING AWAY FROM THE SUN |
| METEORITE | | PART OF THE SUN YOU SEE |
| AURORA | | DECEMBER 21 |
| PHOTOSPHERE | | GROUP OF STARS |
| PERIGEE | | FIRST DAY OF SPRING |
| GALAXY | | FRAGMENTS OF ROCK THAT ORBIT THE SUN |
| CHROMOSPHERE | | LARGEST MOONS OF JUPITER |
| ASTRONOMY | | LESS ENERGETIC |
| APHELION | | HOW BRIGHT SOMETHING APPEARS TO BE |
| LIGHT-YEAR | | BEGINNING OF SUMMER |
| PARALLAX | | LOCATION IN A PLANE'S ORBIT FARHEST FROM THE SUN |
| GALILIAN MOONS | | SO DENSE THAT LIGHT CANNOT ESCAPE |
| AUTUMNAL EQUINOX | | LENGTH OF TIME REQUIRED FOR ONE FULL ORBIT |
| ASTRONOMICAL UNIT | | INTERSTELLAR CLOUD |
| ECCENTRICITY | | NORTHERN LIGHTS |
| NEBULA | | DISTANCE FROM THE SUN TO THE EARTH |
| PHASE | | COLOR-SPHERE |
| PLANET | | MOON, GIBBOUS |
| KUIPER BELT | | HOW BRIGHT SOMETHING ACTUALLY IS |
| ORBITAL PERIOD | | SUN CENTERED |
| QUASARS | | DEGREE OF ELONGATION OF AN ELLIPSE |
| BLUESHIFT | | FEMALE HORSE (DARK SPOT ON THE MOON) |
| INTERFEROMETRY | | VERY BRIGHT STAR |
| GEOCENTRIC | | DEBRIS IN THE SOLAR SYSTEM |
| DARK MATTER | | MASSIVE ATMOSPHERES OF GAS |
| CORONA | | APPARENT DISPLACEMENT OF ORIENTATION OF AN OBJECT VIEWED FROM TWO DIFFERENT PLACES |
| CRATER | | DEPRESSION |
| REFLECTING | | COLLAPSED STAR |
| HELIOCENTRIC | | HOW LONG IT TAKES A GALAXY TO MAKE ONE FULL ROTATION |
| WINTER SOLTICE | | EARTH CENTERED |
| ORION ARM | | CLOSEST TO EARTH |
| PERIHELION | | UNKNOWN SUBSTANCE NOT EMITTING LIGHT |
| CONSTELLATION | | LOCAL ARM |
| GALACTIC YEAR | | MOST COMMONLY USED THEORY FOR UNIVERSE BIRTH |
| BIG BANG THEORY | | EARTH, MARS, JUPITER |
| COMET | | OUTER PLANETS |
