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Solar and Lunar Eclipse

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J Jayasankar

on 10 January 2015

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Transcript of Solar and Lunar Eclipse

Solar and Lunar

- Jenani and Haiqa
What is a solar eclipse?
As seen from earth, all solar eclipses occur when the Moon passes between the Sun and Earth. When this happens you require a new moon. A solar eclipse looks like a dish of sunlight with a black circle in the center. You may think a solar eclipse should occur every month because the new moon comes every month, but that is not correct. The Moon’s orbit is not a perfect orbit. The moon’s orbit is tilted more than 5 degrees to earth’s orbit. Also remember the Moon is not big as the Sun, it is just because the Sun is so far away. This creates an illusion that they are the same size.

Many people think a solar eclipse occurs because of religious reasons. It is actually a natural phenomenon. Some even say it has supernatural causes. Its different ways people think of it.

There are some in the world who are frightened of solar eclipses. This is because they don’t know the astronomical explanation.

Since looking directly at the Sun can lead to permanent blindness, special eye protection is used for viewing a solar eclipse.

How does a solar eclipse work?
Solar eclipses occur with new moons. The Moon passes between the Sun and Earth and remember solar eclipse won’t occur every month because of the Moon’s tilted orbit. This explains why we have full Moons and new moons. Every month even though a solar eclipse has about 2 chances every year it is still rare. The picture below will explain the steps:

When does a lunar eclipse occur?
Lunar eclipses occur in seasons in years such as 2013-2016 in an average there are 2 lunar eclipses each year. This year we will be having 2 total lunar eclipses. One was on April 15, 2014 and one will be on October 8, 2014. On April 15, 2014 the lunar eclipse was visible to Australia, Pacific and the Americas. On October 8, the lunar eclipse will be visible to Asia, Australia, Pacific and the Americas.

The total lunar eclipse will be an average of 2-3 hours.

The pictures below explain briefly about the time and area.

Interesting facts on lunar eclipses
-some lunar eclipses can last up to 3hours 45 minutes
-eclipses can alternate from solar to lunar
-Three times a year is the maximum times a lunar eclipse can occur
-April 15th 2014 was when the first blood lunar eclipse occurred

Here is a short video.
What is a Lunar Eclipse?
A lunar eclipse is when the moon is in the earth's umbra so it's not getting a lot of light from the sun. But because of the light that does get through causing lunar eclipses have a rusty red color.The picture below will explain how lunar eclipses work.
When does a Solar Eclipse Happen?
A Solar Eclipse happens when a new moon partially or fully blocks the sun. It can only happen when there is a new moon because the moon has to pass in between the Earth and Sun, and the new moon is the only time it does that. But these eclipses could happen very month, but don't since there is a tilt in the moon's orbit. The new moon usually misses Earth. The Earth's orbit is called the elliptic orbit ,for a solar eclipse to happen the new moon has to cross this plane.
Fun facts about solar eclipses
Between 2 & 5 solar eclipses happen every year
A total solar eclipse can only happen 1 time every 1 and half years
Almost identical eclipses occur after 18 years and 11 days, this is known as the Saros Cycle
There was an annular Solar Eclipse on the 29th of April 2014!
There will also be a partial solar eclipse on the 23rd of October
How Does a Lunar Eclipse Come?
A Lunar Eclipse occurs only when the Moon, Sun and Earth are aligned exactly or very closely.The Moon has to be in Earth's Umbra (shadow) so that no light can get to it.But since light bends, it gets to the moon anyway causing the reddish color of a Lunar Eclipse.Also if earth had no atmosphere, the moon would be dark since the light has to pass through it to get the reddish color.
Full transcript