Send the link below via email or IMCopy
Present to your audienceStart remote presentation
- Invited audience members will follow you as you navigate and present
- People invited to a presentation do not need a Prezi account
- This link expires 10 minutes after you close the presentation
- A maximum of 30 users can follow your presentation
- Learn more about this feature in our knowledge base article
Solar and Lunar Eclipses
Transcript of Solar and Lunar Eclipses
History of Solar Eclipses What is a Solar Eclipse? •Total Solar Eclipse
•Annular Solar Eclipse
•Hybrid Solar Eclipse
•Partial Solar Eclipse The Moon itself is a cold, rocky, solid that
does not have its own light, but instead reflects the Sun's light shone on its crater-filled surface. It fully orbits the Earth after every 29 and a half days. As this is occuring, the moon goes through at least 9 different phases. When the Moon is covered by the Earth's umbra shadow, the Earth's atmoshpere naturally blocks blue coloured light/wavelenghts and other colours in the spectrum. The light that is able to make it through are variations of different shades of brown, red, orange and yellow. The colour intensity depends on how much dust is in Earth's atmosphere. Without the atmoshpere, the Moon would be completely black (absence of light) during total lunar eclipses. The history of the solar eclipse varies all around the world. Solar eclipses have been a key point in history and is connected with many myths and traditions today. Full Moons play a highly significant role to lunar eclipses. A lunar eclipse can only occur in the time of a Full Moon, no matter what type of lunar eclipse it is.
This happens when the Moon passes through Earth's shadow, and therefore is completely covered by Earth's shadow, reflecting no sunlight.
On average, it occurs only every six months. Lunar eclipses are unable to happen every month since the Moon is tilted 5 degrees to Earth's orbit. Because of this, the Moon's either too much above or below Earth's shadow. A solar eclipse occurs when the Moon is between the Sun and Earth. Solar eclipses can only happen when there is a new Moon and occurs between two and five every year. If the Sun were in a perfectly circular orbit, closer to the Moon and in the same orbital plane solar eclipses would happen every month but unfortunately for eclipse enthusiasts this is not the case. While viewing an annular or partial solar eclipse you should use special eye protection. New Moon -> New Crescent -> First Quarter -> Waxing Gibbous -> Full Moon -> Waning Gibbous -> Last Quarter -> Old Crescent -> New Moon Penumbral lunar eclipse
Partial lunar eclipse
Total lunar eclipse What is a lunar eclipse? Moon passes through Earth's
penumbral shadow, and is very subtle and hard to see Just a portion of the moon
is able to pass through the
Earth's umbra shadow The whole Moon is covered
by Earth's umbra shadow. Very visible due to the vibrant red colour it gives out. Can only happen when the Sun, Earth and Moon are perfectly lined up. http://www.mreclipse.com/Special/LEprimer.html
http://www.moongiant.com/Solar_Eclipse_Calendar.php The next lunar eclipse that is able to be witnessed from North America is on May 25, 2013. This will be a penumbral eclipse.
The next total lunar eclipse visible in North America will fall on April 15, 2014.
On November 3, 2013 there will be a hybrid solar eclipse. André Danjon A french astronomer born on April 6, 1890 and died on April 21, 1967. he successfully invented the Danjon scale, which idenitifies the overall darkness of a lunar eclipse, based on that scale. He was rewarded a Gold Medal of the Royal Astronomical Society in 1958 for his work. L=0 dark, almost invisible
L=1 dark, gray or brown
L=2 deep red, similar to rust
L=3 brick-red with yellow rim
L=4 copper red or orange with bright rim History of Lunar Eclipses Ancient Egyptians were convinced that whenever there was a lunar eclipse, it meant a sow (female pig) was swallowing the moon, while Mayans thought it was a jaguar and in ancient China it was thought to be a three-legged toad. Another famous possibilitiy was that a demon may have been swallowing the moon, and therefore people began trying to throw rocks toward the moon.
Famous voyager, Christopher Columbus benefited from a total lunar eclipse during his fourth voyage in 1504. He used it to frighten Jamaicans into feeding him and his crew. They also thought it was a sign that God was angry with them. A Total Solar Eclipse is when the dark silhouette of the Moon completely covers the Sun, leaving a faint solar corona. An Annular Solar Eclipse is when the Sun and Moon are exactly in line but because the Sun is bigger than the Moon, the Sun is just a very bright ring around the darkness of the Moon. A Hybrid Eclipse is an eclipse that shifts between an annular and total eclipse. This is when on certain places on Earth it appears a total eclipse and other annular. This kind of eclipse is rare. A Partial Eclipse is when just a portion of the Sun is covered by the Moon. In ancient China people observed solar eclipses, but they believed that a dragon was consuming the Sun. While there were ancient Chinese theories, the ancient Greeks also had theories and believed it was a bad omen and was a sign of angry gods. Works Cited Future Lunar Eclipses Future Solar Eclipses As you saw in the previous video solar eclipses are special occasions for people all around the world. The next chance for us to see a solar eclipse is on October 23, 2014 and this will be a partial eclipse.