| A | B |
|---|
| constellations | patterns of stars in the sky |
| false | True or false? Stars in a constellation are all close together in space and are all the same distance from Earth. |
| visible light | light you see with your eyes |
| electromagnetic radiation | energy that can travel directly through space in the form of waves |
| wavelength | the distance between the crest of one wave & the crest of the next wave |
| spectrum | the range of wavelengths of electromagnetic waves |
| radio waves, infrared radiation, visible light, ultraviolet radiation, X-rays, & gamma rays | What are the different kinds of electromagnetic waves that make up the electromagnetic spectrum? |
| true | True or false? Radio waves have longer wavelengths and gamma rays have shorter wavelengths. |
| reflecting & refracting | What are 2 types of visible light telescopes? |
| refracting telescope | What kind of telescope uses convex lenses to gather a large amount of light & focus it onto a small area? |
| reflecting telescope | What type of telescope uses mirrors to focus a large amount of light onto a small area? |
| Galileo | Who used a refracting telescope in 1609 to look at objects in the sky? |
| Isaac Newton | Who built the first reflecting telescope in 1668? |
| radio telescopes | What devices have curved, reflecting surfaces that are used to detect radio waves? |
| observatory | a building that contains one or more telescopes |
| The sky is clearer & not brightened by city lights. | Why are most large observatories located on mountaintops? |
| They can be used day or night & in any type of weather. | What is an advantage of using a radio telescope instead of a visible light telescope? |
| Hubble Space Telescope | What is the reflecting telescope on a satellite above Earth's atmosphere that can see objects in space more clearly than any other telescope? |
| spectrograph | an instrument that breaks the light from an object into colors & photographs the resulting spectrum |
| a star's chemical composition & its temperature | What information about a star can be learned by using a spectrograph? |
| hydrogen & helium | What are most stars made of? |
