Astronomy Artifact 6.E.1.1

By NaTasja Jeter

Moon Phases

Our first topic in astronomy was about the moon it's eight phases. The first phase is called the new moon, and that is when we can't see the moon. The second phase is called the waxing crescent, it is when we only see a little bit of the moon. Next, there is the first quarter, which is when we only see half of the moon. Now, we are at the waxing gibbous which means we see most of the moon but not all of it. Then, we are finally at the full moon, and now we can see the whole moon. We are almost finished. Then, there is the next phase which is the waning gibbous and we still see most of the moon. The third quarter is next and we see half of the moon again. Last, we have the the waning crescent and we see only a little bit of the moon. Then, it just starts all over. The difference between waxing and waning is that when the moon is waxing it is showing more and more of the moon. When it is waning you are seeing lesser and lesser of the moon. The difference between crescent and gibbous is that when it is a crescent the amount of light hitting the moon increases. When it is gibbous the amount of light hitting the moon decreases. The length of this cycle is about 29.5 days.

Tides

Our next topic is about tides. There are 2 types of tides Spring Tide and Neap Tide. The Spring Tide is when the earth is between the moon and the sun. When this happens the sun and the moon work together and the high tides are are facing the moon and the sun and the low tides are on the sides of earth. Also during a Spring Tide the moon is either full or new. Then, there is the Neap Tide that is when the moon is on the sides of earth. The sun and the moon are now working against each other and the high tides are facing the moon and the low tides are facing the the sun. Also during this Tide the moon is either in first quarter or third quarter. Now there is Diurnal and Semi-diurnal tides. In Diurnal there is only 1 low tide and 1 high tide. During a Semi-diurnal tide there are 2 high tides and 2 low tides. Another thing to know is that the moon has more impact on earth than the sun because it is closer to earth than the sun.Here are some photos to help you out.

Eclipses

We had another topic about eclipses and it is really cool. There are two eclipses called lunar and solar. A lunar eclipse is when the moon passes directly behind the earth and the moon starts to look kind of like a red, orange color. A solar eclipse is when the moon passes directly between the earth and the sun. It makes a certain spot on earth look really dark and the stars start to come out. You can also see the shadow of the moon if you where glasses only. During an eclipse our (the earth)'s shadow has 2 parts a penumbra and an umbra. The umbra is where all of the light is blocked meaning there is no light. The penumbra is the part where only part of the light is blocked meaning there is very little light.

Seasons

Our last topic was about seasons. We learned about rotations which is when the earth spins around on it's axis and when it turns around completely that is what we call one day. Then, we have a revolution which is when the earth circles the sun completely which is what we call a yearit is also 365 1/4 days. Now, lets talk about the tilt of the earth. The tilt of earth while its orbiting the sun is how we have the seasons. When the earth tilts to where the northern hemisphere is closer to the sun we have summer, but when it is farther away we have winter. In between those two there is spring and fall. A year is 365 1/4 because of the way it orbits the sun. We have a leap year every 4 years because of this which adds an extra day to Feburary. There is a northern hemisphere, southern hemisphere, and an equator. The northern hemisphere is the part of earth closest to the north pole. The southern hemisphere is the part of earth that is closest to the south pole. Then, there is the equator which an invisible line in the center of earth and it is really hot. At the bottom there is a video on the rotation and revolution of earth. Enjoy!

Here is a video on the rotation and revolution of the earth.

Rotation and Revolution of Earth | Educational Video for Kids