Flashcards
Physics 96 - Observing the universe
Cards in this deck (10)
- 1Advantages of a space telescope?-No atmospheric pollution or chromatic aberration from the atmosphere
-No light pollution
-Can pick up wavelengths otherwise absorbed by the atmosphere
-Not affected by weather - 2Disadvantages of space telescopes?-Expensive to build and launch
-Space programs are being discontinued as they are expensive - this means it may become hard to keep up maintenance on space telescopes - 3How are sites chosen for ground-based telescopes?-High above cloud level to limit atmosphere getting in the way
-Away from major cities to prevent light pollution
-In areas with consistently dry and cloudless weather
-Away from pollution - 4Difficulties presented by the sites chosen for ground based telescopes?-Transporting materials
-Expensive
-have to build roads to get there
-Some astronomers may not be able to access them as they are far away - 5Advantages of computer-controlled telescopes?-remote access
-Can be positioned very precisely
-Can be computer analysed for wavelengths that are not visible to the human eye - 6Considerations for building new telescopes?-Cost
-Environmental and social impact
-Workers conditions - 7how much will the ELT cost? How will it be paid for?-1 billion
-Countries will unite - 8Gamma ray bursts?-Random
-No one knows where they come from - they are very energetic bursts of energy
-When they occur, telescopes can quickly send the coordinates to observatories that may be looking at them to be studied - 9Supernova?-Last one was 400 years ago
-Very rare event
-The first signs will be a flood of neutrinos that neutrino observatories will pick up
-They will then send this info to astronomers who will turn to the skies to look for info - 10Online research?-The Milky Way project is putting images online and getting help from the public to help map and analyse out solar system
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- Physics Flashcards on Physics 96 - Observing the universe, created by Harry Mercer on 22/06/2017.
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- Harry Mercer
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