PHY 111 EXAM 1 FINAL STUDY GUIDE
4.6-Hours---ans-✔✔Sunlight-takes-8.4-minutes-to-get-from-the-Sun-to-Earth.-When-
NASA's-New-Horizons-Spacecraft-passed-Pluto-in-2016,-it-was-33-AU-from-Earth.-How-
long-did-it-take-for-its-transmitted-images-of-Pluto-to-arrive-at-Earth?
The-seasons-would-be-more-extreme,-because-the-Sun's-rays-would-be-more-direct-in-
summer,-and-less-direct-in-winter.---ans-✔✔If-the-Earth's-rotation-axis-were-tilted-by-45-
degrees-instead-of-23.5-degrees,-what-are-some-of-the-implications,-and-why?
our-evening-view-of-space-depends-on-where-Earth-is-located-in-its-orbit-around-the-Sun---
ans-✔✔In-any-particular-place-on-Earth,-certain-constellations-are-visible-in-the-evening-
only-at-certain-times-of-the-year-because...
over-many-days-or-weeks,-the-planet-moves-westward-relative-to-the-stars,-rather-than-
the-usual-eastward-relative-to-the-stars---ans-✔✔During-the-time-that-a-planet-is-in-its-
period-of-apparent-retrograde-motion,
The-tilt-of-Earth's-axis-causes-different-portions-of-the-Earth-to-receive-more-direct-
sunlight-and-more-hours-of-sunlight-at-different-times-of-year.---ans-✔✔Which-of-the-
following-best-describes-why-we-have-seasons-on-Earth?
3,600---ans-✔✔How-many-arcseconds-are-in-one-degree?
It-appears-very-near-the-north-celestial-pole.---ans-✔✔What-makes-the-North-Star,-
Polaris,-special?
a-useful-illusion-used-to-map-the-stars-and-other-objects-in-the-sky---ans-✔✔The-celestial-
sphere-is...
full---ans-✔✔If-the-Moon-is-setting-at-6-A.M.,-the-phase-of-the-Moon-must-be
Solar-eclipses-would-be-much-rarer.-Total-solar-eclipses-would-last-much-longer.---ans-
✔✔What-effect-or-effects-would-be-most-significant-if-the-Moon's-orbital-plane-were-
exactly-the-same-as-the-ecliptic-plane,-the-plane-of-the-Earth's-orbit?
The-Moon's-umbra-must-touch-the-area-where-you-are-located.---ans-✔✔In-addition-to-
the-conditions-required-for-any-solar-eclipse,-what-must-also-be-true-in-order-for-you-to-
observe-a-total-solar-eclipse?
4.6-Hours---ans-✔✔Sunlight-takes-8.4-minutes-to-get-from-the-Sun-to-Earth.-When-
NASA's-New-Horizons-Spacecraft-passed-Pluto-in-2016,-it-was-33-AU-from-Earth.-How-
long-did-it-take-for-its-transmitted-images-of-Pluto-to-arrive-at-Earth?
The-seasons-would-be-more-extreme,-because-the-Sun's-rays-would-be-more-direct-in-
summer,-and-less-direct-in-winter.---ans-✔✔If-the-Earth's-rotation-axis-were-tilted-by-45-
degrees-instead-of-23.5-degrees,-what-are-some-of-the-implications,-and-why?
our-evening-view-of-space-depends-on-where-Earth-is-located-in-its-orbit-around-the-Sun---
ans-✔✔In-any-particular-place-on-Earth,-certain-constellations-are-visible-in-the-evening-
only-at-certain-times-of-the-year-because...
over-many-days-or-weeks,-the-planet-moves-westward-relative-to-the-stars,-rather-than-
the-usual-eastward-relative-to-the-stars---ans-✔✔During-the-time-that-a-planet-is-in-its-
period-of-apparent-retrograde-motion,
The-tilt-of-Earth's-axis-causes-different-portions-of-the-Earth-to-receive-more-direct-
sunlight-and-more-hours-of-sunlight-at-different-times-of-year.---ans-✔✔Which-of-the-
following-best-describes-why-we-have-seasons-on-Earth?
3,600---ans-✔✔How-many-arcseconds-are-in-one-degree?
It-appears-very-near-the-north-celestial-pole.---ans-✔✔What-makes-the-North-Star,-
Polaris,-special?
a-useful-illusion-used-to-map-the-stars-and-other-objects-in-the-sky---ans-✔✔The-celestial-
sphere-is...
full---ans-✔✔If-the-Moon-is-setting-at-6-A.M.,-the-phase-of-the-Moon-must-be
Solar-eclipses-would-be-much-rarer.-Total-solar-eclipses-would-last-much-longer.---ans-
✔✔What-effect-or-effects-would-be-most-significant-if-the-Moon's-orbital-plane-were-
exactly-the-same-as-the-ecliptic-plane,-the-plane-of-the-Earth's-orbit?
The-Moon's-umbra-must-touch-the-area-where-you-are-located.---ans-✔✔In-addition-to-
the-conditions-required-for-any-solar-eclipse,-what-must-also-be-true-in-order-for-you-to-
observe-a-total-solar-eclipse?
