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- 1. Multiple Choice
Which ancient civilization concluded that the Earth was round by observing sailing ships?ancient Romansancient Greeksancient Egyptiansancient Persians - 2. Multiple ChoiceWhich philosopher calculated the size of the Earth using shadows, angles and wells?AristotlePythagorasEratosthenesSocrates
- 3. Multiple ChoiceYou can see the curve of the Earth’s edge as the shadow moves across the Moon during ___a lunar eclipsea solar eclipsethe Moon's cycle of phasesa new moon
- 4. Multiple ChoiceIn the 17th century, which two scientists laid the mathematical groundwork of planetary orbits?Johannes Kepler and Galileo GalileiIsaac Newton and Robert HookeGalileo Galilei and Robert HookeJohannes Kepler and Isaac Newton
- 5. Multiple ChoiceThe distance from the Earth to the Sun is given the name ___the basic astronomical distance, or BADthe Sun-Earth distance, or SEDthe astronomical unit, or AUthe light-year, or LY
- 6. Multiple ChoiceThe passage of a planet across the disk of the Sun is called ___a conveyancea transitosmosisa permeation
- 7. Multiple ChoiceWhen using transits to calculate the Earth-Sun distance, why are results not highly accurate?our atmosphere blurs the imagesthe timing devices aren't accurate enoughtelescopes aren't powerful enoughthe events occur too rarely
- 8. Multiple ChoiceIn the 1960s, to calculate the AU, radio telescopes were used to bounce radar pulses off of ___the SunVenusMercuryJupiter
- 9. Multiple ChoiceOur ability to determine distances between objects and see the world in three dimensions is called ___depth perception3D cognitiontriangulationperspicacity
- 10. Multiple ChoiceThe shift in position of an object, viewed along two different lines of sight, is called ___paralysestriangulationparallaxperspicacity
- 11. Multiple ChoiceWhen using parallax, the distance between the two observation points is called ___the astronomical distancethe astronomical unitthe wavelengththe baseline
- 12. Multiple ChoiceThe first star to have its parallax successfully measured was 61 Cygni, in the year ___1838188819381988
- 13. Multiple ChoiceA light-year is defined as ___the distance light travels in a yearthe time that light travels in a yearthe distance between the Earth and the Sunthe time for Earth to orbit the Sun
- 14. Multiple ChoiceA parallax shift of one arcsecond (1/3600th of a degree) is called ___a light-yearan astronomical unita parseca Kessel Run unit
- 15. Multiple ChoiceHow far away is Proxima Centauri, the nearest star to the Sun?4.2 astronomical units42 astronomical units4.2 light years42 light years
- 16. Multiple ChoiceTwo stars that give off the same amount of energy are said to have the same ___intrinsic brightnessapparent brightnesselemental luminositynative luminosity
- 17. Multiple ChoiceIf you have two stars that are the same intrinsic brightness and one is twice as far as the other, it will be ___just as bright1/2 as bright1/4 as bright1/8 as bright
- 18. Multiple ChoiceThe temperature of a star can be found using ___parallaxspectroscopytrigonometryits diameter
- 19. Multiple ChoiceSome newer methods of finding distances use pulsars which are ___stars that seem to blink with a regular rhythmdying starsexploding starsstars that change size over time
- 20. Multiple ChoiceWe see stars in other galaxies, which means we can use them to determine ___the size and scale of the Universethe size of our galaxythe scale of our solar systemthe accuracy of the astronomical unit
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