Term
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Definition
| refracting and reflecting |
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Term
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Definition
| bends light using lenses to collect and focus light |
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Term
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Definition
| uses mirrors to gather light and then reflect it onto a second mirror |
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Term
| the focal plane of the Human Eye |
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Definition
| plane at which the image is detected (the retina in the back of the eye), where it focuses onto one point |
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Term
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Definition
| the color obtained in astronomical images are composite of images taken at different wave bands (blue, green and red, lowest to highest respectively) |
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Term
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Definition
taking images with multiple telescopes and combining them
advantages: covers more area, no single point of failure
disadvantages: expensive, need to combine all of their individual signals |
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Term
| the 3 categories of astronomical observation |
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Definition
| imaging (cameras), spectroscopy (spectra of distant objects), and timing (how brightness changes over time) |
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Term
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Definition
| the details in spectrums, some of which blur together in a lower resolution |
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Term
| what are the strongest wavelengths and what are the weakest related to Earth's atmosphere? |
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Definition
radio and visible waves penetrate the deepest
x-rays and gamma rays the least |
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Term
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Definition
| satellite dish with a metal dish that has a mirror inside, designed to bring the waves to a focus in front of the mirror to the 2nd mirror, the receiver |
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Term
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Definition
must be placed in high altitudes because they generally do not reach the ground, many are launched into space
structurally, infrared telescopes are similar to visible-light telescopes |
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Term
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Definition
similar in wavelength to visible and infrared wavelengths
earth's atmosphere absorbs most ultraviolet light, making ground observations almost impossible, so they are also launched into space, where the wavelengths are collected and focused with mirrors |
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Term
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Definition
| special mirrors needed to deflect x-rays, and large light-collecting areas allow for detailed x-ray spectra |
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Term
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Definition
| need detectors, not mirrors, that are very heavy |
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