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- 2. Hole An area in space with extremely strong gravity that nothing, not even light, can escape from. Black holes are formed when massive stars
- 4. A person trained to travel and work in space. Astronauts go on missions aboard spacecraft to conduct research, explore other planets, or repair satellites. They wear special suits and helmets.
- 8. Vehicles designed to travel in space. Spacecraft can be manned or unmanned and are used for exploration, satellite deployment, and scientific research. They can travel to other planets and beyond.
- 9. Large celestial bodies that orbit around a star. Planets are like Earth but can be different in size, composition, and the presence of life. They include planets like Mercury, Venus, Mars, and Jupiter.
- 11. Huge systems made up of stars, planets, gas, and dust held together by gravity. The Milky Way is our galaxy. Galaxies come in various shapes and sizes and contain billions or even trillions of stars.
- 12. System The system of planets, moons, asteroids, and comets that revolve around a star called the Sun. Our solar system includes the Sun, eight planets, their moons, and various other celestial objects.
- 13. Station A large structure built in space that serves as a home and workplace for astronauts. Space stations orbit around the Earth and are used for scientific research, experimentation, and long-term space travel.
- 14. A small rock or debris from space that enters Earth's atmosphere and burns up, creating a streak of light in the sky. Meteors are also known as shooting stars or falling stars.
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- 1. Powerful vehicles designed to travel into space. Rockets are used to launch spacecraft and satellites. They work by propelling hot gases out of the rocket's engines, creating a force called thrust.
- 3. A celestial object made of ice, dust, and rock that orbits around the Sun. Comets have a glowing coma and a tail that becomes visible as they approach the Sun. They are often called "dirty snowballs."
- 5. Optical instruments used to observe objects in space from Earth. Telescopes can magnify faraway objects like planets, stars, and galaxies, allowing scientists and astronomers to study them in detail.
- 6. A scientist who studies celestial objects like stars, planets, galaxies, and other phenomena in space. Astronomers use telescopes and other instruments to observe and understand the universe.
- 7. Vast clouds of gas and dust in space. Nebulas can be colorful and have different shapes. They are often regions where new stars are born or where old stars release material back into space.
- 10. Giant balls of hot, glowing gas that emit light and heat. Stars are scattered throughout space and can vary in size, color, and brightness. Some stars, like the Sun, provide heat and light to planets.
- 11. The force that pulls objects toward each other. Gravity keeps planets in orbit around the Sun and moons around planets. It also determines our weight on Earth and affects the movement of objects in space.
- 14. A natural satellite that orbits around a planet. Earth has one moon. The moon appears in the night sky and changes shape over a month in a process called lunar phases.