Astronomy

Phases Of The Moon , Seasons , Tides and Eclipse

Phases Of The Moon

There are 8 phases of the moon here are a few things you might want to know about moons.


  • Waxing vs Waning. Waxing basically means that the moon is increasing in illumination and Waning means that the moon is losing illumination .
  • Crescent vs Gibbous . Crescent means that the moon is less than half illuminated and Gibbous means that the moon is more than half illuminated.
  • The lunar cycle takes 29.5 days.

Tides

Tides are caused by the sun and moons gravitational pull against the earth. Here are a few things you might need to know about tides


  • Neap vs Spring . Neap tides are weak tides as the moon and the sun are at right angles and the moon is at 1st quarter or 3rd quarter when this sort of tide occurs. A spring tide is a stronger tide as the moon and sun are working together as they are all in a straight line so the gravitational pull is stronger.
  • Diurnal vs. Semidirunal. Diurnal is when there Is only one low tide and one high tide in a day. A semidiurnal tide is when there is two high tides and two low tides.
  • The moon and Sun impact the tides as its there gravitational pull that pulls the tides.

Here are some pictures on tides.

Eclipse

Eclipse here are a few things you might want to know for eclipse


  • Lunar vs Solar. A lunar eclipse is when the moon passes through the the earths shadow so the sun rays are not hitting it. A solar eclipse is when the moon comes in front of the earth and blocks some of the Suns rays.
  • Shadows - Penumbra and umbra. Penumbra is when the moon or earth cast a shadow creating a eclipse. An Umbra is when the moon is fully in darkness.

Seasons

Seasons occur due to the tilt of the earth on its axis.


  • Revolution is the earths yearly rotation around the sun.
  • Rotation is the spinning of the earth on its axis
  • The tilt on the axis is a very important part of seasons as when it tilts the sun has further to travel at the top so it is colder.
  • Northern Hemisphere vs. Southern Hemisphere vs. the Equator. The Northern hemisphere is above the equator and the southern hemisphere is below the equator . The equator lies around the middle of the earth .