oxygen /ˈɒk.sɪ.dʒən/
Definition: A gas essential for human life, found in the air
Example: Astronauts carry tanks of oxygen to breathe in space.

explore /ɪkˈsplɔːr/
Definition: To travel through a place to learn about it
Example: Robots are used to explore distant planets.

satellite /ˈsæt.əl.aɪt/
Definition: An object that orbits a planet, often used for communication or observation
Example: The weather satellite provides real-time data on storms.

moon /muːn/
Definition: The natural satellite that orbits the Earth
Example: The full moon lit up the night sky.

spacecraft /ˈspeɪs.krɑːft/
Definition: A vehicle designed for travel in space
Example: The spacecraft carried scientific instruments to study Saturn.

Mars /mɑːz/
Definition: The fourth planet from the Sun, known as the Red Planet
Example: Scientists hope to send humans to Mars in the next decade.

rocket /ˈrɒk.ɪt/
Definition: A vehicle designed to travel through space, propelled by engines
Example: The rocket launched successfully from the space center.

over the moon (idiom)
Definition: Extremely happy or pleased
Example: She was over the moon when she was selected for the space mission.

universe /ˈjuː.nɪ.vɜːs/
Definition: All of space, including all the planets, stars, and galaxies
Example: Scientists study the universe to understand its origins.

horizon /həˈraɪ.zən/
Definition: The line where the Earth’s surface and the sky appear to meet
Example: They watched the sun rise over the Martian horizon.

colonisation /ˌkɒl.ə.naɪˈzeɪ.ʃən/
Definition: The process of taking control of and settling in a new area
Example: Colonisation of Mars would require creating sustainable habitats.

launcher /ˈlɔːn.tʃər/
Definition: A device or structure that sends spacecraft or missiles into the air or space
Example: The rocket stood on the launcher, ready for countdown.

gravity /ˈɡræv.ə.ti/
Definition: The force that attracts objects towards each other, especially towards the centre of the Earth
Example: The astronauts felt weightless because gravity is weaker in space.

uninhabitable /ˌʌn.ɪnˈhæb.ɪ.tə.bəl/
Definition: Not suitable for humans to live in
Example: Without life support systems, Mars is uninhabitable for humans.

acclimatise /əˈklaɪ.mə.taɪz/
Definition: To adapt to a new environment or condition
Example: Astronauts need time to acclimatise to zero gravity.

sustain /səˈsteɪn/
Definition: To keep something alive or going
Example: They built systems to sustain human life on Mars.

space tourism /ˈspeɪs ˌtʊə.rɪ.zəm/
Definition: Travel into space for recreational purposes
Example: Space tourism is becoming more popular among wealthy travelers.

undergo /ˌʌn.dəˈɡəʊ/
Definition: To experience something, often difficult or unpleasant
Example: Astronauts undergo rigorous training before a mission.

simulate /ˈsɪm.jə.leɪt/
Definition: To imitate real conditions for training or testing
Example: Trainees use machines that simulate space conditions.