Presentation on theme: "Engage: Use the Big Dipper to find the North Star, Arcturus, Cassiopeia. Find Summer Triangle, Milky Way. Explore: Students make a sample observation of."— Presentation transcript:
Engage: Use the Big Dipper to find the North Star, Arcturus, Cassiopeia. Find Summer Triangle, Milky Way. Explore: Students make a sample observation of a two fist by two fist section of the sky that contains a bright star. Compare entries with a neighbor. As a class, brainstorm characteristics of an effective sky observation and an effective notebook entry. Explain: Outline Earth’s two main motions (rotation and revolution) and how those affect observations Review the use of a planisphere (star wheel) Practice using a star wheel Elaborate: Outside naked eye observations using star wheel as a map Telescope observations of Jupiter, Jupiter’s moons (Europa, Ganymede, Callisto), Neptune. Three of Jupiter’s moons and Neptune contain solid and maybe liquid water Evaluate: Use star wheel to identify two objects in the sky chosen by the instructor.
Heading for each entry should include Date and time Location Sky and weather conditions Sketch observation on a grid with the x-axis being the horizon and the y-axis being the altitude. Measure height above the horizon (altitude) and degrees from compass direction in fists. A closed fist held at arm’s length subtends an angle of about 10 degrees from top to bottom. Add other interesting items and facts to your entry.
To find the rising or setting time of a star Locate the star on the planisphere. Rotate the dial so the star is touching the eastern half (rising) or western half (setting) of the planisphere. Find the date in question on the planisphere. Read the time that that date is lined up with. (If daylight savings time is in effect, you’ll need to add an hour to the time you read.) Practice question: What time does the bright star in the constellation Virgo rise on March 10?
To find the sky orientation for a specific day and time. Find the date in question on the planisphere. Rotate the planisphere so the time you want is lined up with that date. (Don’t forget about the daylight savings time correction.) Now, you can look at the planisphere and determine where a star is located on any day at any time. Practice question: When is the bright star in the constellation Leo due south at midnight?
1) What time does the bright star in the constellation Taurus rise on May 1? 2) What time does the bright star in the constellation Taurus set on May 1? 3) What time does the bright star in the constellation Bootes rise on October 10? 4) What time does the bright star in the constellation Bootes set on October 10?
ConstellationsStars(Stellar features)Other objects AndromedaM31 Andromeda galaxy AquilaAltairwhite BootesArcturusorange giant Cassiopia Cephius Cephi variable (per.=5.4 d.) CygnusDenebmost distant bright star Alberiobinary star, diff colors HerculesM13 Globular cluster LyraVegaM57 Ring nebula Lyrae double binary star Sagittarius M8 Lagoon nebula, M22 globular cluster ScorpiusAntaresred super giant Ursa MajorBig Dipper, M81 spiral galaxy Ursa MinorPolarisnear N celestial poleLittle Dipper VirgoSpicablue starVirgo cluster of galaxies