Gravity and Orbital Motion
Completion requirements
Pori drwy'r eirfa gan ddefnyddio'r mynegai hwn
Arbennig | A | B | C | CH | D | DD | E | F | FF | G | NG | H | I | L | LL | M | N | O | P | PH | R | RH | S | T | TH | U | W | Y | Y CYFAN
A
Aphelionthe point in an orbit farthest from the Sun. | |
Artificial satellitea human-made object placed into orbit. | |
C
Celestial bodya natural object in space, such as a planet, moon, star, or asteroid. | |
Centripetal forcea force directed toward the centre of a circular or curved path. | |
Circular orbitan orbit with approximately constant distance from the central object. | |
Crewed missiona space mission carrying humans. | |
E
Ellipsean oval-shaped closed curve with two foci. | |
Escape velocitythe minimum initial speed required to escape a body's gravitational influence without further propulsion. | |
F
Focusone of two special points used to define an ellipse. | |
G
Geostationary orbitan orbit in which a satellite appears stationary above one point on Earth's equator. | |