| A | B |
|---|
| SOLAR SYSTEM | tHE SUN AND THE PLANETS AND OTHER OBJECTS THAT ORBIT THE SUN |
| OUR SOLAR SYSTEM CONSISTS OF | SUN AND NINE KNOWN PLANETS |
| GEOCENTRIC MODEL | REPRESENTATION OF THE UNIVERSE IN WHICH STARS AND PLANETS REVOLVE AROUN THE EARTH |
| PTOLEMY | PROPOSED A GEOCENTRIC MODEL OF THE UNIVERSE |
| HELIOCENTRIC MODEL | REPRESENTATION OF THE RELATIONSHIP BETWEEN THE SUN AND PLANETS IN WHICH THE PLANETS REVOLVE AROUND THE SUN |
| COPERNICUS | HYPOTHESIZED A HELIOCENTRIC MODEL OF THE SOLAR SYSTEM |
| BIG BANG THEORY | A HYPOTHESIS, SUPPORTED BY DATA, THAT DESCRIBES HOW THE UNIVERSE BEGAN WITH A HUGE EXPOLOSION. HOLDS THAT EVERYTHING WAS ONCE AT ONE TINY POINT |
| TRAJECTORY | CURVED COURSE A SPACECRAFT TAKES |
| WHY IS IT DIFFICULT TO CALCULATE A SPACE PROBES TRAJECTORY | BECAUSE IT MUST TAKE INTO ACCOUNT THE DIFFEENT BODIES MOVEMENTS, THEIR GRAVITY,OTHER FACTORS THAT MIGHT INFLUENCE THE SPACECRAFTS COURSE |
| GRAVITY ASSIST | A MANEUVER, WHERE A SPACE PROBE USES THE GRAVITATIONAL PULL OF A PLANE TO CHANGE ITS DIRECTION AND EVEN ITS SPEED |
| INNER PLANETS | MERCURY, VENUS, EARTH, AND MARS. |
| MERCURY, VENUS, AND MARS RESEMBLES EARTH IN WHAT 3 WAYS | SIZE, DENSITY, AND ROCKY COMPOSITION |
| TERRESTRIAL PLANETS | EARTH-LIKE |
