Adolescence /ˌæd

gravity /ˈgræv.ɪ.ti/ /-ə.t ̬i/ noun [ U ] FORCE
1. the force which attracts objects towards one another, especially the force that makes things fall to the ground
the laws of gravity
horizon /həˈraɪ.z ə n/ noun [ S ]
the line at the farthest place which you can see, where the sky seems to touch the land or sea
The moon rose slowly above the horizon.
We could see a row of camels silhouetted on the horizon.
launch /lɔːn t  ʃ/ /lɑːn t  ʃ/ noun [ C ] LEAVE LAND
2. when a ship is sent to see, or a rocket into space, for the first time
The launch of the space shuttle was delayed for 24 hours because of bad weather.
meteor /ˈmiː.ti.ɔː r / /-t ̬i.ɔːr/ noun [ C ] specialized
a piece of rock or other matter from space that produces a bright light as it travels through the Earth's atmosphere
See also shooting star ; falling star