Throughout this unit, we learned about tides, their causes and what influences them. In preparing for this blogpost, I came across two different kinds of tides (besides high and low tide) called “spring” and “neap” tides. These tides correlate with the moon phases, in that spring tides occur during the new or full moon, and the neap tides 7 days after the spring tides.
Spring tides are more extreme in their difference between high and low tide. This occurs when the Sun, Moon, and Earth are more or less aligned, and thus the gravitational pull of the Sun and Moon are “added”, creating higher high tides and lower low tides. Neap tides refers to when the Sun and Moon are at right angles to each other, canceling out each others pull a little bit, creating a lower high tide and a higher low tide; the tides are less extreme in their differences between each other.
From Chapter 2, we learned about how the zodiac symbols are derived from the constellations that are along the ecliptic. As the Earth orbits around the sun, different constellations are visible. The Babylonians set the zodiac signs over 3,000 years ago in correlation with their 12 month calendar. While we still use the same time frame for determining things such as your zodiac sign, it is no longer accurate. The sky as we see it is different than the sky the Babylonians due to a shift in the Earth’s axis (North Pole). It does not point in the same celestial direction that it once did, so while you might think you are a Sagittarius, you might be a Capricorn instead!
This post serves as a trial to make sure that all is set up and formatted correctly, but I do want to include something fun! Below is a picture of the Milky Way Galaxy (the same picture we used in class). I really enjoyed the last lecture because it made me realize just now massive the universe is and how small I am in the grander scheme of things. It was incredibly humbling.