فهرست
Alien
Title: Alien
Pronunciation: /ˈeɪliən/
Part of speech: noun/adjective
Formal or informal: Can be both formal and informal
Countable or uncountable: Countable
Stress marks: ˈeɪliən
Synonym (noun): extraterrestrial, foreigner
Synonym (adjective): foreign, overseas
Opposite (noun): earthling, native
Opposite (adjective): domestic, local
(noun): a being from another planet; a foreigner
(noun): The movie depicted an alien invasion of Earth
(adjective): belonging to a foreign country or nation
(adjective): She had to fill out an alien registration form when moving to a new country.
Space
Title: Space
Pronunciation: /speɪs/
Part of speech: noun
Formal or informal: Can be both formal and informal
Countable or uncountable: Uncountable
Stress marks: speɪs
Synonym: cosmos, universe, expanse
a continuous area or expanse that is free, available, or unoccupied
The astronauts conducted experiments in space
Outer space
Title: Outer space
Pronunciation: /ˈaʊtə speɪs/
Part of speech: noun
Formal or informal: Can be both formal and informal
Countable or uncountable: Uncountable
Stress marks: ˈaʊtə speɪs
Synonym: cosmos, universe, expanse
the physical universe beyond the earth’s atmosphere
Astronomers study celestial bodies in outer space
Universe
Title: Universe
Pronunciation: /ˈjuːnɪvəːs/
Part of speech: noun
Formal or informal: Can be both formal and informal
Countable or uncountable: Uncountable
Stress marks: ˈjuːnɪvəːs
Synonym: cosmos, space, creation
all existing matter and space considered as a whole; the cosmos
The Big Bang theory is related to the origin of the universe
Asteroid
Title: Asteroid
Pronunciation: /ˈastərɔɪd/
Part of speech: noun
Formal or informal: Can be both formal and informal
Countable or uncountable: Countable
Stress marks: ˈastərɔɪd
Synonym: planetoid, minor planet, celestial body
a small rocky body that orbits the sun, especially between the orbits of Mars and Jupiter
The asteroid belt is located between Mars and Jupiter
Black hole
Title: Black hole
Pronunciation: /blak həʊl/
Part of speech: noun
Formal or informal: Can be both formal and informal
Countable or uncountable: Countable
Stress marks: blak həʊl
Synonym: singularity, abyss, vortex
a region of space having a gravitational field so intense that no matter or radiation can escape
Scientists study the effects of black holes on nearby stars
Galaxy
Title: Galaxy
Pronunciation: /ˈɡaləksi/
Part of speech: noun
Formal or informal: Can be both formal and informal
Countable or uncountable: Countable
Stress marks: ˈɡaləksi
Synonym: star system, cosmic system, nebula
a system of millions or billions of stars, together with gas and dust
The Milky Way is just one of many galaxies in the universe
Solar system
Title: Solar system
Pronunciation: /ˈsəʊlə sɪstəm/
Part of speech: noun
Formal or informal: Can be both formal and informal
Countable or uncountable: Countable
Stress marks: ˈsəʊlə sɪstəm
Synonym: planetary system, star system, heliocentric system
Definition: the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
Example
Our solar system is located within the Milky Way galaxy
Mercury
Title: Mercury
Pronunciation : /ˈmɜːkjʊri/
Part of speech : noun
Formal or informal :Can be both formal and informal
Countable or uncountable: Uncountable
Stress marks: ˈmɜːkjʊri
The smallest planet in the solar system and the one nearest to the sun
Mercury has a very thin atmosphere
Venus
Title: Venus
Pronunciation : /ˈviːnəs/
Part of speech : noun
Formal or informal :Can be both formal and informal
Countable or uncountable: Uncountable
Stress marks ˈviːnəs
The second planet from the sun in our solar system
Venus is often referred to as Earth’s “sister planet.”
Mars
Title: Mars
Pronunciation : /mɑːz/
Part of speech : noun
Formal or informal: Can be both formal and informal
Countable or uncountable: Uncountable
Stress marks :mɑːz
The fourth planet from the sun in our solar system
Mars has been a subject of interest for potential human colonization
Jupiter
Title: Jupiter
Pronunciation : /ˈdʒuːpɪtə/
Part of speech : noun
Formal or informal Can be both formal and informal
Countable or uncountable: Uncountable
Stress marks :ˈdʒuːpɪtə
The largest planet in our solar system
Jupiter has a distinctive red spot known as the Great Red Spot
Saturn
Title: Saturn
Pronunciation : /ˈsætən/
Part of speech : noun
Formal or informal: Can be both formal and informal
Countable or uncountable: Uncountable
Stress marks: ˈsætən
The sixth planet from the sun in our solar system
Saturn is known for its prominent ring system
Uranus
Title: Uranus
Pronunciation : /ˈjʊərənəs/
Part of speech : noun
Formal or informal Can be both formal and informal
Countable or uncountable: Uncountable
Stress marks: ˈjʊərənəs
The seventh planet from the sun in our solar system
Uranus is unique among planets because it rotates on its side.
Neptune
Title: Neptune
Pronunciation : /ˈnɛptjuːn/
Part of speech : noun
Formal or informal :Can be both formal and informal
Countable or uncountable: Uncountable
Stress marks :ˈnɛptjuːn
The eighth planet from the sun in our solar system
Neptune is often referred to as an “ice giant.”
Astronomy
Title: Astronomy
Pronunciation : /əˈstrɒnəmi/
Part of speech : noun
Formal or informal: Can be both formal and informal
Countable or uncountable: Uncountable
Stress marks :əˈstrɒnəmi
Synonym: cosmology, astrophysics
The branch of science that deals with celestial objects, space, and the physical universe as a whole
Astronomy involves the study of stars, planets, galaxies, and other celestial objects
Astronomer
Title: Astronomer
Pronunciation: /əˈstrɒnəmə/
Part of speech: noun
Formal or informal: Can be both formal and informal
Countable or uncountable: Countable
Stress marks: əˈstrɒnəmə
Synonym: stargazer, stargazing expert
a person who studies astronomy, the branch of science that deals with celestial objects, space
The astronomer discovered a new comet
landing
Title: landing
Pronunciation: /ˈlandɪŋ/
Part of speech: noun
Formal or informal: Can be both formal and informal
Countable or uncountable: Countable
Stress marks: ˈlandɪŋ
Synonym: touchdown, arrival
Opposite: takeoff
The action of coming to rest on a surface, typically the ground or another solid surface
The airplane made a smooth landing on the runway
outer
Title: outer
Pronunciation: /ˈaʊtə/
Part of speech: adjective
Formal or informal: Can be both formal and informal
Countable or uncountable: Uncountable
Stress marks: ˈaʊtə
Synonym: external, exterior
Opposite: inner, internal
situated on the outside; external
The outer layer of the Earth is called the crust
orbit
Title: orbit
Pronunciation: /ˈɔːbɪt/
Part of speech: noun/verb
Formal or informal: Can be both formal and informal
Countable or uncountable: Countable (noun), Uncountable (verb)
Transitive or intransitive: Intransitive (verb)
Stress marks: ˈɔːbɪt
Synonym (noun): trajectory, path, course
Synonym (verb): circle, revolve
Opposite (noun): stationary, standstill
Opposite (verb): still, stay
(noun): the curved path of a celestial object or spacecraft around a star, planet, or moon
(noun): The moon orbits the Earth
(verb): move in an orbit around (a celestial object)
(verb): The spacecraft will orbit Mars for scientific observations
Rocket
Title: Rocket
Pronunciation: /ˈrɒkɪt/
Part of speech: noun/verb
Formal or informal: Can be both formal and informal
Countable or uncountable: Countable (noun), Uncountable (verb)
Transitive or intransitive: Intransitive (verb)
Stress marks: ˈrɒkɪt
Synonym (noun): missile, spacecraft
Synonym (verb): speed, race
Opposite (noun): anchor, weight
Opposite (verb): slow down, decelerate
A cylindrical projectile that can be propelled to a great height
(noun): The rocket was launched into space
(verb): move or travel very fast
(verb): The car rocketed down the highway
Satellite
Title: Satellite
Pronunciation: /ˈsatəlʌɪt/
Part of speech: noun/adjective
Formal or informal: Can be both formal and informal
Countable or uncountable: Countable (noun), Uncountable (adjective)
Stress marks: ˈsatəlʌɪt
Synonym (noun): space probe, orbiter
Synonym (adjective): orbital, space-based
Opposite (noun): main body, central object
Opposite (adjective): terrestrial, earthbound
(noun): an artificial body placed in orbit around the earth or moon or another planet
(noun): The satellite transmitted data back to Earth
(adjective): relating to or denoting a satellite
(adjective): The satellite communications system was upgraded
To launch
Title: To launch
Pronunciation: /lɔːntʃ/
Part of speech: verb/noun
Formal or informal: Can be both formal and informal
Countable or uncountable: Countable (noun), Uncountable (verb)
Transitive or intransitive: Transitive
Stress marks: lɔːntʃ
Synonym (verb): start, initiate, commence
Synonym (noun): liftoff, takeoff, commencement
Opposite (verb): stop, halt, cease
Opposite (noun): termination, end
(verb): to start or set in motion; to send off on a specific course or mission
(verb): The company plans to launch a new product next month
(noun): an act or instance of launching something
(noun): The rocket launch was successful
Take off
Title: Take off
Pronunciation: /teɪk ɒf/
Formal or informal: Can be both formal and informal
Countable or uncountable: Uncountable
Transitive or intransitive: Intransitive
Stress marks :teɪk ɒf
Synonym :depart, lift off
Opposite :land
To leave the ground and begin to fly
The plane will take off shortly
spacecraft
Title: spacecraft
Pronunciation : /ˈspeɪskrɑːft/
Part of speech : noun
Formal or informal Can be both formal and informal
Countable or uncountable: Countable
Stress marks :ˈspeɪskrɑːft
Synonym: spaceship
a vehicle used for travel or operation in outer space
The spacecraft is equipped with advanced technology for space exploration
spaceman
Title: spaceman
Pronunciation : /ˈspeɪsmæn/
Part of speech : noun
Formal or informal Can be both formal and informal
Countable or uncountable: Countable
Stress marks :ˈspeɪsmæn
Synonym :astronaut, cosmonaut
An astronaut
The spaceman conducted experiments on the space station
spaceship
Title: spaceship
Pronunciation : /ˈspeɪsʃɪp/
Part of speech : noun
Formal or informal :Can be both formal and informal
Countable or uncountable: Countable
Stress marks :ˈspeɪsʃɪp
Synonym :spacecraft
A spacecraft piloted by astronauts for travel in outer space
The spaceship is on a mission to explore distant planets
space station
Title: space station
Pronunciation : /ˈspeɪs steɪʃ(ə)n/
Part of speech : noun
Formal or informal :Can be both formal and informal
Countable or uncountable: Countable
Stress marks: ˈspeɪs steɪʃ(ə)n
Synonym :orbital station
a large artificial satellite on which people can live and work for long periods
Astronauts conduct scientific research on the space station
Astronauts conduct scientific research on the space station
Title: Astronauts conduct scientific research on the space station
Pronunciation : /ˈspeɪs.suːt/
Part of speech : noun
Formal or informal: Can be both formal and informal
Countable or uncountable: Countable
Stress marks :ˈspeɪs.suːt
Synonym: astronaut suit
A garment worn by astronauts during space flights
The spacesuit protects astronauts from the harsh conditions of space
voyage
Title: voyage
Pronunciation : /vɔɪɪdʒ/
Part of speech : noun/verb
Formal or informal Can be both formal and informal
Countable or uncountable: Countable
Transitive or intransitive :Intransitive
Stress marks vɔɪɪdʒ
Synonym (noun) : journey, trip
Synonym (verb) : travel, sail
(noun) : a long journey involving travel by sea or in space
(noun) : The sailors embarked on a voyage around the world
(verb) : travel somewhere in a ship or boat
(verb) : They voyaged across the ocean