Across
- 3. The ability of an optical instrument to produce separate images of closely spaced objects.(2 words)
- 6. A condition in which the force of gravity is greatly reduced, such as experienced by astronauts in space.
- 7. The range of wavelengths of electromagnetic radiation, such as visible light, radio waves, or X-rays.
- 8. The study of the characteristics of a spectrum, such as the intensity and wavelength of its components, to determine the composition or properties of the source.(2 words)
- 11. The distance that light travels in one year, approximately 9.46 trillion kilometers (5.88 trillion miles).
- 12. A shift in the wavelength of light to longer wavelengths, indicating that an object is moving away from the observer.(2 words)
- 15. Global Positioning System, a satellite-based navigation system that provides location and time information anywhere on Earth.
- 19. The lens at the eyepiece of a telescope that magnifies the image produced by the objective lens. (2 words)
- 20. An ancient instrument used to observe and calculate the positions of celestial bodies.
- 23. Objects in space, such as quasars or pulsars, that emit strong radio waves.(2 words)
- 24. bodies: Objects in space, such as stars, planets, moons, and comets.
- 25. Technology used to improve the performance of optical systems by reducing the effects of atmospheric distortion.(2 words)
- 28. satellite: A human-made object that orbits a planet, usually for communication, weather monitoring, or scientific research.
- 30. An instrument used to observe and analyze the spectra of light emitted by sources such as stars or gases.
- 32. A device used to separate light into its different wavelengths, creating a spectrum.(2 words)
- 34. The belief or model that places the sun at the center of the solar system, with the planets, including Earth, orbiting around it.
- 37. An orbit around Earth with an altitude between 160 kilometers (99 miles) and 2,000 kilometers (1,200 miles).(3 words)
- 39. Sets of numbers used to specify the position of a point or object, often measured in terms of latitude and longitude on Earth or celestial coordinates in the sky.
- 42. planets: The planets Mercury, Venus, Earth, and Mars, which are closer to the sun in our solar system.
- 44. The law proposed by Isaac Newton stating that every mass attracts every other mass in the universe with a force proportional to the product of their masses and inversely proportional to the square of the distance between them.(2 words)
- 46. The speed at which exhaust gases leave a rocket engine, determining the thrust and efficiency of the rocket.(2 words)
Down
- 1. The planets Jupiter, Saturn, Uranus, and Neptune, which are farther from the sun in our solar system. (2 words)
- 2. A type of telescope that uses mirrors to gather and focus light.
- 4. Energy that is transmitted through electromagnetic waves, including visible light, radio waves, and X-rays.(2 words)
- 5. The change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source.(2 words)
- 9. The apparent shift in position of an object when viewed from different angles.
- 10. A tool that shows the direction of magnetic north and is used for navigation.
- 13. The belief or model that places the Earth at the center of the universe, with other celestial bodies orbiting around it.
- 14. A vehicle or device propelled by one or more rocket engines, especially such a vehicle designed to travel through space.
- 16. missile: A missile that is initially powered and guided but falls under gravity onto its target.
- 17. A large, round object in space that orbits a star, such as the Earth or Mars.
- 18. unit: A unit of measurement equal to the average distance between the Earth and the Sun, approximately 150 million kilometers (93 million miles).
- 21. The study of celestial objects by observing the radio waves they emit. (2 words)
- 22. Specific wavelengths of light that are emitted or absorbed by atoms or molecules, characteristic of the element or compound.(2 words)
- 25. The horizontal angle measured clockwise from a reference direction, usually the north, to a point in the sky or the horizon.
- 26. A type of telescope that uses lenses to gather and focus light.
- 27. A method of determining the position of a point by measuring angles to it from known points at either end of a fixed baseline.
- 29. A set of coordinates that helps describe the motion of an object, usually by comparing it to another object or point that is considered stationary.(3 words)
- 31. A rocket that has multiple stages, with each stage containing its own engines and fuel.(2 words)
- 33. An optical instrument used to observe distant objects by collecting and focusing light.
- 35. Patterns formed by stars in the sky that people have named and used for navigation or storytelling.
- 36. A technique used to increase or decrease the speed of a spacecraft by using the gravity of a planet or other celestial body to alter its trajectory.(2 words)
- 38. Orbiting the Earth at an altitude where the satellite's orbital period matches the Earth's rotation period, allowing it to remain stationary relative to a point on the Earth's surface.
- 40. The lens at the front of a telescope that gathers and focuses incoming light.(2 words)
- 41. The study of the interaction between matter and electromagnetic radiation, used to identify substances and study their properties.
- 43. A geometric shape that is like a stretched circle, often used to describe the orbit of planets.
- 45. The height of an object or point in the sky above the observer's horizon.