Across
- 5. X-ray wavelengths are shorter than ultraviolet wavelengths are. The shortest wavelengths are the _________ wavelengths.
- 8. When white light passes through a _______, the light is broken into a continuous set of colors.
- 9. The bending of light by lenses.
- 10. Approximate age of the universe in years
- 12. The _______ wavelengths of visible light are blue and violet.
- 17. A type of telescope that collects only visible light. Two types are refracting telescopes and reflecting telescopes.
- 18. The ______ is approximately 300,000km/s.
- 21. By studying objects like black holes, new planets, stars, and nebulas, scientists have learned more about the origin of the _______ and the processes involved in the formation of the solar system.
- 22. The glow in the sky from street lighting and other lighting that obstructs our view of the stars.
- 25. The human eye can see only radiation of wavelengths in the _________________ range of the electromagnetic spectrum.
- 27. The distance between Earth and the Sun (approximately 150,000,000 km)
- 30. Though all light travels at the same speed, different colors of light have different ________.
- 31. In 1800, the scientist Sir Frederick William Hershel placed a thermometer in an area where he could not see any light. When the ___________ increased, he discovered that there were invisible parts of the Electromagnetic Spectrum.
- 32. The name for the type of light that has wavelengths that are slightly shorter than visible light and have frequencies slightly higher than violet light. Means “beyond the violet.”
Down
- 1. The scientific study of the universe.
- 2. Who invented the reflecting telescope?
- 3. The name for the type of light that has wavelengths that are slightly longer than visible light and have frequencies slightly lower than red light. Means “below the red.”
- 4. Besides our sun, the next closest star is ______ light years away from the Earth.
- 6. The first astronomer to use a telescope to view details about distant objects in the sky, like craters on the moon and that the Milky Way is made of stars.
- 7. The distance that light travels in one year (approximately 9.46 x 1012 km)
- 11. Between 1969 and 1972, NASA landed _______ people on the moon.
- 13. The _______ wavelengths of visible light are orange and red.
- 14. The galaxy that we live in.
- 15. The nearest part of of the universe to Earth is the ____ which includes our sun, the 8 planets, and many smaller objects like moons and comets.
- 16. the study of the origin, properties, processes, and evolution of the universe.
- 19. A collection of stars, dust, and gas that are bound together by gravity.
- 20. Besides telescopes, computer and _________ models are used to study the universe.
- 23. All of the wavelengths of light including radio waves and X-rays.
- 24. The giant explosion that formed the universe.
- 26. _____ Have even longer wavelengths than infrared waves do.
- 28. An instrument that collects electromagnetic radiation from the sky and concentrates it for better observation.
- 29. Studying the universe has potential benefits to humans. For example, studying how stars shine many one day lead to improved or new ____________ on Earth.