Moon Phases & Eclipses Fly Swatter Game. Waxing Crescent Moon 1 A G H ED BC F I.
REMINDERS - Institute for AstronomyPREDICTING MOON PHASES • The Moon phase for tonight is Waxing...
Transcript of REMINDERS - Institute for AstronomyPREDICTING MOON PHASES • The Moon phase for tonight is Waxing...
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REMINDERS:
•MasteringAstronomy Homework #0 due this Friday
•MasteringAstronomy Homework #1 available this evening
•Office Hours:Tuesday & Thursday afternoons, 2:00-3:00 PM
• Email: [email protected]
Tuesday, July 8, 2014
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PHASES OF THE MOON
Tuesday, July 8, 2014
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MOON PHASES
Tuesday, July 8, 2014
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MOON PHASES
Tuesday, July 8, 2014
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MOON PHASES
Waxing Waning
Tuesday, July 8, 2014
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MOON PHASES
Full
New Moon = Dark
Waxing Waning
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MOON PHASES
FullGibbous Gibbous
New Moon = Dark
Waxing Waning
Tuesday, July 8, 2014
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MOON PHASES
FullGibbous GibbousQuarter Quarter
New Moon = Dark
Waxing Waning
Tuesday, July 8, 2014
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MOON PHASES
FullGibbous GibbousQuarter Quarter
Crescent
New Moon = Dark
Waxing Waning
Crescent
Tuesday, July 8, 2014
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LUNAR ANIMATIONS
http://astro.unl.edu/naap/lps/animations/lps.html
• http://astro.unl.edu/classaction/animations/lunarcycles/moonbisector.html
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Tuesday, July 8, 2014
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CLASS ACTION!
Tuesday, July 8, 2014
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WHY DOES THE MOON HAVE PHASES?
• (A) As the moon moves in its orbit, different parts are illuminated, but the same side always faces Earth
• (B) Light rays are bent by the Moon’s gravity, and it appears dark when aligned correctly
• (C) The Sun is malfunctioning
• (D) The Earth casts a shadow on the Moon
Tuesday, July 8, 2014
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WHY DOES THE MOON HAVE PHASES?
• (A) As the moon moves in its orbit, different parts are illuminated, but the same side always faces Earth
• (B) Light rays are bent by the Moon’s gravity, and it appears dark when aligned correctly
• (C) The Sun is malfunctioning
• (D) The Earth casts a shadow on the Moon
Tuesday, July 8, 2014
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CAUSES OF LUNAR PHASES• The light we see from the Moon is reflected sunlight.
•Depending on where the Moon is in its orbit, our perspective from Earth changes
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EARTH-MOON SYSTEM
•Moon Radius: 1737 km (~1/4 of Earth’s radius)
• Full Lunar cycle takes 29.5 days
• Earth-Moon average distance is 384,400 km
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CLASS ACTION!
Tuesday, July 8, 2014
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WHICH OF THE FOLLOWING POSITIONS IS A NEW MOON?
Tuesday, July 8, 2014
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WHICH OF THE FOLLOWING POSITIONS IS A NEW MOON?
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WHICH OF THE FOLLOWING POSITIONS IS A WANING CRESCENT?
Tuesday, July 8, 2014
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WHICH OF THE FOLLOWING POSITIONS IS A WANING CRESCENT?
Tuesday, July 8, 2014
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PREDICTING MOON PHASES
• If the Moon is at full phase when you observe it, what phase will it be at in 4 days?
• (A) Waning Gibbous
• (B) Waxing Crescent
• (C) Waning Half
• (D) New
Tuesday, July 8, 2014
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PREDICTING MOON PHASES
• If the Moon is at full phase when you observe it, what phase will it be at in 4 days?
• (A) Waning Gibbous
• (B) Waxing Crescent
• (C) Waning Half
• (D) New
Tuesday, July 8, 2014
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PREDICTING MOON PHASES
• The Moon phase for tonight is Waxing Gibbous (shown below). What will it be in 16 days on the day of our Midterm?
• (A) New
• (B) Full
• (C) Waning Crescent
• (D) Waxing Gibbous
Tuesday, July 8, 2014
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PREDICTING MOON PHASES
• The Moon phase for tonight is Waxing Gibbous (shown below). What will it be in 16 days on the day of our Midterm?
• (A) New
• (B) Full
• (C) Waning Crescent
• (D) Waxing Gibbous
Tuesday, July 8, 2014
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PREDICTING MOON PHASES
• The Moon phase for next Tuesday is Waning Quarter (shown below). What time (approximately) will it rise?
• (A) 6:00 AM (sunrise)
• (B) Noon
• (C) 6:00 PM (sunset)
• (D) Midnight
Tuesday, July 8, 2014
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PREDICTING MOON PHASES
• The Moon phase for next Tuesday is Waning Quarter (shown below). What time (approximately) will it rise?
• (A) 6:00 AM (sunrise)
• (B) Noon
• (C) 6:00 PM (sunset)
• (D) Midnight
Tuesday, July 8, 2014
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MOON RISE AND SET TIMES
Tuesday, July 8, 2014
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ECLIPSES
• Lunar Eclipse: Earth comes between the Sun and the Moon, casting its shadow on the Moon
• Solar Eclipse: The Moon comes between the Sun and the Earth, blocking the Sun’s light
• Eclipses occur in seasons, twice per year as the orbits line up
Tuesday, July 8, 2014
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ECLIPSES
Tuesday, July 8, 2014
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LUNAR ECLIPSE
Tuesday, July 8, 2014
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LUNAR ECLIPSE
Tuesday, July 8, 2014
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LUNAR ECLIPSE
Tuesday, July 8, 2014
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CLASS ACTION!
Tuesday, July 8, 2014
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IF THE MOON’S ORBIT WAS NOT TILTED WITH RESPECT TO THE
EARTH...
• About how many eclipses might we see in one year?
• (A) 7
• (B) 12
• (C) 10
• (D) 29.5
Tuesday, July 8, 2014
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IF THE MOON’S ORBIT WAS NOT TILTED WITH RESPECT TO THE
EARTH...
• About how many eclipses might we see in one year?
• (A) 7
• (B) 12
• (C) 10
• (D) 29.5
Tuesday, July 8, 2014
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CLASS ACTIVITY!
Tuesday, July 8, 2014
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LECTURE-TUTORIAL
Tuesday, July 8, 2014
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LECTURE-TUTORIAL
• In your group, work through the following:
•The Cause of Moon Phases (pages 81-83)
• Discuss answers---don’t be silent!
• I will be walking around if you need help.
• If your group finishes early, check your answers with groups around you.
Tuesday, July 8, 2014