. Many decades ago, the astronomers on the staff of Mount Wilson and Palomar Observatories each received about 60 nights per year for their observing programs. Today, an astronomer feels fortunate to get 10 nights per year on a large telescope. Can you suggest some reasons for this change?

19)The Hubble Space Telescope (HST) is projected to maintain operation until at least 2030, but it has already revolutionized high-resolution imaging of solar-system bodies in visible and ultraviolet (UV) light wavelengths, notwithstanding that only about 6% of the bodies imaged by the HST are within the solar system. NASA researcher Cindy L. Young and colleagues assert that a new space telescope dedicated exclusively to solar-system observations would permit an extensive survey of minor solar-system bodies and long-term UV observation to discern how solar-system bodies change over time. Young and colleagues' recommendation therefore implies that the HST ______ Which choice most logically completes the text?IFRPRAEN-019will likely continue to be used primarily to observe objects outside the solar system.will no longer be used to observe solar system objects if the telescope recommended by Young and colleagues is deployed.can be modified to observe the features of solar system objects that are of interest to Young and colleagues.lacks the sensors to observe the wavelengths of light needed to discern how solar system bodies change over time.

How do you imagine the work of an astronomical observatory?

In astronomy, an interferometer can be used toGroup of answer choicesspeed up the processing of CCD imagesyield better seeing conditions with optical telescopesimprove the angular resolution of radio telescopesincrease the sensitivity of infrared telescopes to longer wavelengthsdecrease the effects of light pollution in getting darker sky backgrounds

The largest observatory complex in the world is on Mauna Kea, the tallest mountain on Earth. What are some factors astronomers consider when selecting an observatory site? Don’t forget practical ones. Should astronomers, for example, consider building an observatory on Denali (Mount McKinley) or Mount Everest?

Scientists can use telescopes that are sensitive to different wavelengths of the electromagnetic spectrum to make observations across the universe. Which of these can be used to detect the motion of objects successfully even on a cloudy day?ResponsesA radio telescoperadio telescopeB infrared observatoriesinfrared observatoriesC visible light telescopevisible light telescopeD ultraviolet observatories