Phases of the moon
Download
1 / 6

phases of the moon - PowerPoint PPT Presentation


  • 261 Views
  • Updated On :

Phases of the Moon. New 0% Illuminated Waxing Crescent 25% Illuminated on RHS First Quarter 50% Illuminated on RHS Waxing Gibbous 75% Illuminated on RHS Full 100% Illuminated Waning Gibbous 75% Illuminated on LHS Third (Last) Quarter 50% Illuminated on LHS

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'phases of the moon' - ostinmannual


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Phases of the moon l.jpg

Phases of the Moon

New 0% Illuminated

Waxing Crescent 25% Illuminated on RHS

First Quarter 50% Illuminated on RHS

Waxing Gibbous 75% Illuminated on RHS

Full 100% Illuminated

Waning Gibbous 75% Illuminated on LHS

Third (Last) Quarter 50% Illuminated on LHS

Waning Crescent 25% Illuminated on LHS


Rising meridian setting times l.jpg
Rising/Meridian/Setting Times

*Assuming the moon is always on the celestial equator and above the horizon 12 hours per day.


Lunar periods l.jpg
Lunar Periods

  • Sidereal Period – 27.3 days

    • The time between successive alignments of the earth, moon, and a star

    • The true orbital period of the moon

  • Synodic Period – 29.5 days

    • The time between successive alignments of the earth, moon, and the sun

    • The period of the cycle of lunar phases


Lunar eclipses l.jpg
Lunar Eclipses

  • Total Lunar Eclipse

    • The moon is entirely inside the earth’s umbra

  • Partial Lunar Eclipse

    • The moon is partially inside the earth’s umbra

  • Penumbral Lunar Eclipse

    • The moon is inside the Earth’s penumbra

    • These happen regularly and no one notices. The brightness of the moon only decreases by 10% to 20%


Solar eclipses l.jpg
Solar Eclipses

  • Total Solar Eclipse

    • The moon completely obscures the sun for an observer at this location on the Earth

  • Partial Solar Eclipse

    • The moon partially obscures the sun for an observer at this location on the Earth

  • Annular Solar Eclipse

    • The moon is near apogee and its angular diameter is insufficient to completely cover the sun. An observer for whom the moon and sun are aligned will see a ring of the sun around the moon


Tides l.jpg
Tides

- caused by differential gravitational forces exerted by the moon (the moon pulls more on one side of the earth than the other)

  • Even though the sun’s gravitational force is much larger than the moon’s, its differential force is smaller (since the size of the earth is small compared to the earth-sun distance)

  • This moon’s differential force causes “water bulges” on the earth on both sides of the line to the moon. Tides are caused by the Earth’s rotation carrying observers through a water bulge. Thus, typically high tide occurs twice a day.

    • Neap Tides – weak tides which occur when the moon’s and sun’s pull are perpendicular

    • Spring Tides – strong tides when the moon and sun are aligned.


ad