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
moon
/muːn/
noun
1.
the moon
[ S ] the round object which moves in the sky around the Earth and can be seen at night
What time does the moon rise/set (= appear/disappear in the sky) ?
2. [ S or U ] the shape made by the amount of the moon that you can see at a particular time
There's no moon (= You cannot see the moon) tonight.
a crescent/full/new moon
3. [ C ] a similar round object that moves around another planet
Jupiter has at least sixteen moons.
ocean
/ˈəʊ.ʃ
ə
n/
/ˈoʊ-/
noun
1. [ S ] a very large area of sea
These mysterious creatures live at the bottom of the ocean.
2. [ C ] used in the name of each of the world's five main areas of sea
the Atlantic/Pacific/Indian/Arctic/Antarctic Ocean
orbit
/ˈɔː.bɪt/
/ˈɔːr-/
noun [ C or U ]
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