html5-img
1 / 29

Star Gazing

Star Gazing. Star Gazing techniques and tips: how to get the most out of looking up at the stars ( powerpoint and notes on class website) Show 2 flashcards/notecards to me. Email me if you haven’t yet stating, “I found the class website.” I sent out the first email yesterday.

carson-ramirez
Télécharger la présentation

Star Gazing

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Star Gazing • Star Gazing techniques and tips: how to get the most out of looking up at the stars (powerpoint and notes on class website) • Show 2 flashcards/notecards to me. • Email me if you haven’t yet stating, “I found the class website.” I sent out the first email yesterday. • If you haven’t given me a code to use for your grades on the class website, see me. http://apod.nasa.gov/apod/ap050129.html

  2. Sky Software • Starry Night College ($30) • SkyX • Stellarium (free) • Celestia (free) • Google Earth and Google Sky https://www.google.com/sky/ (free)

  3. Sky Phone Apps (all free) • Google Sky Map • Phases of the Moon • Sunrise Sunset • ISS Detector (International Space Station) • NASA • Lots of other star apps out there

  4. Positions on the sky - Direction • How can you find N, S, E, or W?

  5. Positions on the sky - Altitude • Horizon and Zenith • 45 degrees • Fist Method: Extended fist is ~10 degrees Exercise (Right angle in classroom) Exercise (Height of building from lobby)

  6. Star Charts • Print Sky Map if you missed lecture: • http://skymaps.com/articles/n1409.html • Finding N, S, E, W • Orienting the star chart • If you face N, hold N down on the chart, closest to you.

  7. From Star Chart to Sky • Note where constellation is on map (direction and altitude) • Use fist method to find it in sky • Examples • Cygnus • Polaris • Mars

  8. Star Hopping • Ursa Major to Ursa Minor (Polaris) • Ursa Major: arc to Arturus (in Bootes) • Cassiopeia: left V eats Polaris • Cassiopeia: right V points to Andromeda (only galaxy visible to the naked eye); then Andromeda curves to Great Square of Pegasus • Deneb (NE) to Altair (southern tip of Summer Triangle) points to bottom left of The Teapot handle

  9. Greek Letters on star charts • Brightest stars in that constellation • Alpha ( α ) • Beta ( β ) • Gamma (γ ) • Delta ( δ ) • Example: Deneb in Cygnus is Alpha Cygni

  10. Why is the TIME on the star chart? • Earth’s Rotation… • Displays different constellations throughout the night • In the northern hemisphere, the stars appear to rotate around Polaris, the North Celestial Pole.

  11. Polaris, the north star, with all of the stars moving around it. The star trails are from the Earth’s rotation. http://apod.nasa.gov/apod/ap091128.html

  12. Why is the DATE on the star chart? • Earth’s Revolution... • Displays different constellations throughout the year

  13. 12 Constellations of the Zodiac seen throughout the year because of Earth’s revolution. • The zodiacal constellations are located along the Sun’s path on Earth (Ecliptic). • The Ecliptic is also the plane of Earth’s path around the Sun. http://lifeng.lamost.org/courses/astrotoday/CHAISSON/AT301/HTML/AT30103.HTM

  14. Apparent Visual Magnitude • Hipparchus • 1 (first magnitude) bright to eye • 2 (second magnitude) fainter • …6 (sixth magnitude) faintest to eye • 1st magnitude is 100 times brighter than the 6th magnitude • Now extended to negative numbers • Example: Sirius, brightest star in the sky has magnitude -1.4

  15. Dark Adaptation In dark, eye pupil enlarges to let in more light. In sun, pupil shrinks to keep out light. Exercise with dim lights

  16. Dark Adaptation • When star gazing, eye pupil needs to open up (~15 minutes) • Eyes have cones and rods (photoreceptors) • Cones see color & adapt to darkness quickly • Rods take 10-30 minutes to adapt to darkness • It shuts down quickly in response to white light but not to red light. • Therefore use red flashlights.

  17. Dark Adaptation • Show red covered flashlights • Turn lights off and use curtains • Show colors displayed around the room • Color differentiation disappears after 10 minutes (color is from cones) • About 15 minutes in, rods take over; no color and now see light trails (sparklers); laser demo

  18. Eye Blind Spot • Cross-dot demo of blind spot (draw on paper) http://www.optics4kids.org/getattachment/13cb7b00-117a-4e69-9d5d-35ad7d949199/Optical-Illusions.aspx

  19. Dark Adaptation Blind Spot • Little dipper & Polaris example http://www.optics4kids.org/getattachment/13cb7b00-117a-4e69-9d5d-35ad7d949199/Optical-Illusions.aspx (draw Little Dipper constellation on whiteboard)

  20. 8 Observation Projects • Safe Sun (10 points) • Sunset (Part 1 and Part 2) (5 points each, 10 points total) • Planetarium (10 points) • Star Gazing (25 points) • Telescopes (25 points) • Moon Craters (10 points) • Moon Phases (13 points) • Moon Motion (10 points) TOTAL POINTS = 113 • Each D2L Quiz adds 1% extra credit to this grade

  21. Safe Sun Observation • Sept. 9 or 11 depending on weather; check email and website: http://mctcteach.org/astronomy/ • 8:30am to 3pm • Announcements and demonstrations about every 45 minutes: 8:30am, 9:15, 9:45, 10:30, 11:15, Noon, 12:45, 1:30, 2:15, and 3:00pm. • Bring your prep work with you. Separate instructions for Lecture Only vs. Lab Students.

  22. Sunset Part 1 Observation • Sept. 2 to Sept. 25 to complete • Take a picture of the sunset with 30o open region to the left of the sun (fall sunset). Use fist method (arm outstretched) to measure 30o to the left/south of sunset now. • Specific directions on website for what you need to write down. • Part 2: Nov. 4 to Nov. 18 to complete the 2nd picture in exact same spot

  23. Planetarium Observation • Sept. 2 to Oct. 9 to complete • 5 Options • Bell Museum ExploraDome (Fri, Sat, Sun) – Minneapolis • Como Planetarium (Tuesday evenings) – Minneapolis • Jackson Middle School Observatory (dates TBD) – Champlin, MN • Eisenhower Community Center (Sept. 6 only) – Hopkins, MN 7-10pm (call 952-988-4070 for reservations) • Create your own shoebox planetarium • Class website has more details. Some cost a few dollars.

  24. Star Gazing Observation • Sept. 2 to Dec. 11 to complete • 2 Options • Eagle Lake Observatory at Baylor Regional Park (complete star gazing and telescopes together and possible moon craters) – every other Sat. until Nov. • Easiest way to complete but about an hour drive & $5/car • Star gaze with friends and write a report • Class website has more details.

  25. Telescope Observation • Sept. 2 to Dec. 11 to complete • 7 Options • Eagle Lake Observatory at Baylor Regional Park (complete star gazing and telescopes together and possible moon craters) - every other Sat. until Nov. • Easiest way to complete but about an hour drive & $5/car • Jackson Middle School Observatory (dates TBD) – Champlin, MN • Eisenhower Community Center (dates TBD) – Hopkins, MN 7-10pm (call 952-988-4070 for reservations) • University of MN (Fridays TBD) – Minneapolis, MN • Macalester College (Thursdays TBD) – St. Paul, MN • St. Thomas College (weeknights TBD) – St. Paul, MN • Use your/friends’ telescope and write a report (talk to me) • Class website has more details.

  26. Moon Craters Observation • Sept. 2 to Dec. 11 to complete • 7 Options (same options as Telescope but must have visible Moon, ideal is half Moon) • Eagle Lake Observatory at Baylor Regional Park (complete star gazing and telescopes together and possible moon craters) - every other Sat. until Nov. • Easiest way to complete but about an hour drive & $5/car • Jackson Middle School Observatory (dates TBD) – Champlin, MN • Eisenhower Community Center (dates TBD) – Hopkins, MN 7-10pm (call 952-988-4070 for reservations) • University of MN (Fridays TBD) – Minneapolis, MN • Macalester College (Thursdays TBD) – St. Paul, MN • St. Thomas College (weeknights TBD) – St. Paul, MN • Use binoculars (from my office) and write short report • Class website has more details.

  27. 6 Observation Projects on Calendar for Today • SAFE SUN PREP WORK DUE: SEPT. 9 • OBSERVING PROJECT: SUNSET – Part 1 DUE: SEPT. 25 • OBSERVING PROJECT: PLANETARIUM DUE: OCT. 9 • OBSERVING PROJECT: STAR GAZING DUE: DEC. 11 • OBSERVING PROJECT: TELESCOPE DUE: DEC. 11 • OBSERVING PROJECT: MOON CRATERS DUE: DEC. 11

  28. Homework • See today’s notes • http://mctcteach.org/astronomy/ • Show 2 flashcards/notecards to me. • Email me if you haven’t yet stating, “I found the class website.” I sent out the first email yesterday. • If you haven’t given me a code to use for your grades on the class website, see me.

More Related