Physics II Leeson Name____________________________________ Block______ Date___________________ Quiz IV Observation Tech I.Matching (2) celestial equator equator ecliptic zenith nadir longitude latitude declination azimuth right ascension II. Conversions (2) 5.08cm = __________in 37m = __________mm 144mm = _________cm III. Fill in the blank (2) #The name of the North star is _____________. #You live at _______________________ latitude. #If Vega is 45degrees to the left of George's star, and George is located at 8h45m, then Vega's Right Ascension is _____________. #The _________________________ passes through Greenwich, England. #_______________ was the first Astronomer Royale. # New Iberia, Louisiana, the North star is ________ degrees above the Northern horizon. #Altitude and Azimuth are best used with an _______________ -mount telescope. #RA and Dec are best used with an ______________________-mount telescope. #If your software gives the Altitude of a star as 90o, then it must be at your _____________. #If your software gives you a Declination of 90oNorth, you must be looking at _____________________. The brightest star in the sky is the North star. A) True B) False Which of the two stars along the celestial equator will set first: A) 12h47m B) 13h12m C) 12h18m V. Position the stars - You are facing South looking at the stars on the diagram. Identify each star (put 1 letter by each dot) based on the data given. VI. Paragraph - Why is Declination easy to deal with and Right Ascension not so easy to deal with on an Equatorially mounted telescope? What was the "Longitude Problem"? What problems did it cause? How was it solved? Give a specific example of how the solution works. Why must you know where the North star is if you are using a telescope on an Equatorial mount? VII. Finish the chart by rewriting the RA's and Dec's in a more practical format (for our telescopes). Round Declination to the nearest tenth of a degree and Right Ascension to the nearest minute. Give complete answers. Summer Triangle Vega Lyra-a 18h36m57.84s +38°47'17.89" Deneb Cygnus-a 20h41m26.40s +45°16'14.11" Altair Aquila-a 19h50'47.85" +08°52'25.66" Double Star Cygnus-b 19h30m43.60s +27°57'42.52" Ring Nebula M57 18h53'35.16" +33°01'44.91" Sirius “The Scorching One” Canus Major-a 06h45m3.21s -16°38'39.58"