Astronomy & Space

Stars, planets, cosmic phenomena, space exploration, and astronomical observation.

59 words

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Some words in this topic are A2–C2 — part of Pro. A1 words are always free.

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A1 (2)

/sʌn/ The star that gives light and heat to the Earth and the other planets. M S

/stɑɹ/ A bright point of light seen in the night sky. M S

A2 (4) Pro

/ˈplænət/ A large round object in space that moves around a star such as the Sun. M S

/mun/ The large round object that shines in the sky at night and circles the Earth. M S

/ˈæstɹəˌnɔt/ A person who is trained to travel and work in space. M S

/ˈspeɪsˌʃɪp/ A vehicle designed to carry people through space. M S

B1 (12) Pro

/ˈjuːnəˌvɝs/ Everything that exists, including all of space, time, and matter. M S

/lɑːnt͡ʃ/ To start something new, such as a product, project, or campaign. M S

/ˈætməsˌfɪɹ/ The layer of gases that surrounds the Earth or another planet. M S

/ˈsætəˌlaɪt/ A machine sent into space to orbit the Earth and send back signals or information. M S

/ˌɹæɪ.diˈæɪ.ʃən/ Energy that travels as rays, waves, or particles, such as heat or light. M S

/ˈɔɹ.bɪt/ The curved path an object follows as it circles a planet, star, or other body in space. M S

/həˈɹaɪ.zən/ The line in the distance where the sky seems to meet the land or sea. M S

/ˈkɒmɪt/ A small icy body in space that travels around the Sun and grows a bright glowing tail as it gets close to it. M S

/ˈkæps(ə)l/ A small, smooth case containing medicine that you swallow whole. M S

/ˈmiːtiɚ/ a streak of light produced when a small piece of matter from space enters Earth's atmosphere and becomes intensely hot M S

/ˈɔrbɪtəl/ relating to an orbit or to motion around another body M S

/əˈstɹɑ.nə.mɚ/ A scientist who studies the stars, planets, and the universe. M S

B2 (10) Pro

/ˌɹɛv.əˈluː.ʃən/ A sudden, often violent attempt by people to overthrow a government and change the political system. M S

/ˈɹɑk.ɪt/ A vehicle or device driven through the air or space by burning fuel. M S

/ˈsoʊ.ləɹ/ Relating to the sun. M S

/ˈtɛl.əˌskoʊp/ An instrument that makes distant objects look closer and larger, especially stars and planets. M S

/ˈkɹeɪ.tɚ/ A large bowl-shaped hole in the ground made by an impact or explosion. M S

/əˈstɹɑn.ə.mi/ The scientific study of the stars, planets, and the universe. M S

/ˈmiːtiəˌraɪt/ a piece of rock or metal from space that survives passage through an atmosphere and reaches the ground M S

/ˌsuː.pɚˈnoʊ.və/ an extremely energetic stellar explosion that makes a star suddenly become vastly more luminous M S

/ˈweɪvˌlɛŋ(k)θ/ a shared orientation leading to mutual understanding M S

/ˈspeɪsˌkɹæft/ a vehicle designed to travel or operate in outer space M S

C1 (8) Pro

/ˈɡɹævəti/ The natural force that pulls objects toward the earth or toward each other. M S

/ˈvæ.kjuːm/ A space that contains no matter or air. M S

/əˈrɔrə/ a display of colored light in the polar sky caused by charged solar particles interacting with the upper atmosphere M S

/ˈspɛktrəm/ A wide range of related ideas, opinions, qualities, or things. M S

/ɹoʊˈteɪʃən/ The act of turning around a central point or axis. M S

interstellar C1

/ˌɪntɝˈstɛlɝ/ situated, occurring, or traveling between stars M S

/tɪˈɹɛstɹɪ.əl/ operating or living or growing on land M S

/ˈɛksoʊˌplænət/ a planet located outside our solar system M S

C2 (13) Pro

/ˈɡɛl.ək.si/ a vast gravitationally bound system of stars, gas, dust, dark matter, and other astronomical objects M S

/ˈkɑz.mɪk/ Relating to the universe or outer space. M S

/ˈæst(ə)ɹɔɪd/ a natural rocky or metallic body smaller than a planet that orbits a star, especially one orbiting the Sun M S

/ˈroʊvɚ/ a person who wanders or travels without settling in one place M S

/ˈlunɚ/ of or relating to or associated with the moon M S

gravitational C2

/ˌɡɹævɪˈteɪʃənəl/ Relating to or caused by gravity. M S

/ˈzoʊ.di.æk/ the belt of the sky centered on the ecliptic through which the sun, moon, and visible planets appear to move M S

/ˈnebjələ/ an interstellar cloud of gas and dust, often associated with the formation or death of stars M S

/ˈstɛlɚ/ Exceptional, exceptionally good. M S

/ˈsɑl.stɪs/ either of the two annual times when the sun reaches its greatest apparent distance north or south of the celestial equator, producing the longest or shortest day M S

/ˈekwəˌnɑːks/ either of the two times each year when the Sun crosses the celestial equator and day and night are approximately equal in length M S

/kɑːzˈmɑː.lə.dʒi/ the scientific study of the origin, structure, development, and possible fate of the universe M S

/ˈkweɪ.zɑɹ/ an extremely luminous active galactic nucleus powered by matter falling into a supermassive black hole M S

C2+ (10) Pro

/səˈlɛstʃəl/ relating to the sky or heavens, or to heaven in a divine sense M S

/ɪˈklɪps/ the obscuring of one celestial body by another; to outshine M S

/ˈkrɛsənt/ a curved shape like the partly lit moon M S

astronomical C2+

/ˌæstrəˈnɑmɪkəl/ extremely large; relating to astronomy M S

/ˈkɑzmoʊs/ the universe regarded as an ordered, harmonious whole M S

/ˈneɪdɚ/ the lowest or most unsuccessful point; the point opposite the zenith M S

observatory C2+

/əbˈzɝvətɔri/ a building equipped for observing astronomical or natural phenomena M S

constellation C2+

/ˌkɑnstəˈleɪʃən/ a recognized pattern of stars, or any grouping of related things M S

/ˈplænəˌtɛri/ relating to a planet or planets M S

/ˈziː.nɪθ/ the highest point reached; the point in the sky directly overhead M S

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