Solar Eclipses

Energy radiated from the surface of the sun visible during a solar eclipse appears in the form of the corona, which is the outer atmosphere of the sun. This is a faint, glowing halo of plasma that extends millions of kilometers into space and is only visible during a total solar eclipse when the moon blocks the brighter light from the sun's surface.

A solar eclipse occurs when the Moon passes between the Sun and Earth, blocking the Sun's light from reaching Earth. This alignment causes the Moon to cast a shadow on Earth, resulting in either a total or partial solar eclipse depending on the observer's location within the shadow's path.

The total phase of a solar eclipse can never last longer than 7 minutes and 29 seconds.

MindOfTheLion: But why can't it be? If it occurs during a school day do they stop school to check it out?

A total solar eclipse occurs approximately once every 18 months somewhere on Earth. However, any specific location will only experience a total solar eclipse every few centuries.

During a solar eclipse, the alignment of the Sun, Moon, and Earth creates gravitational forces that can cause a temporary disruption in tides. The gravitational pull of the Sun and Moon on Earth's oceans may vary slightly during an eclipse, leading to either higher or lower tides than normal in some locations.

That is probably not true. Lunar eclipses may happen at night, but they last for hours and they are observable by everyone on earth who can see the moon while it is in progress. Solar eclipses cover only small swatches of earth and last only minutes at any one location.

The maximum number of lunar eclipses that can occur per year is 3 (minimum 0),

and the maximum number of solar eclipses is 5 (minimum 2). However, these

numbers are very rare. On the average over the long term, there are roughly

2.3 lunar and 2.3 solar per year ... partial or total lunar, and partial, annular,

or total solar.

However, it should be noted that because during a solar eclipse the Moon's shadow does not cover the entire surface of the Earth (because the Moon is smaller than the Earth) not everyone on Earth will see the solar eclipse as it occurs. Instead, only those living along the path of the Moon's shadow (called the path of totality) will see it. On the other hand, everyone will be able to see a lunar eclipse. Thus, it is far more common for people to see a lunar eclipse at any given location than a solar eclipse. Put another way, the average time between two solar eclipses seen from the same location is about 360 years while the average time between two lunar eclipses seen from the same location is between 6 and 12 months.

Twice a year, there is a roughly 38 day window of time during which an eclipse could occur. These windows do not occur at the same time every year, so the term "season" does not refer to a particular time during the calendar year (Spring, Summer, etc.). The two eclipse seasons are separated by just under 6 months. Thus, the complete eclipse cycle lasts for roughly 345 days while the calendar year lasts for 365 days, so the eclipse seasons shift earlier and earlier each year - realigning again every 19 years.

A lunar eclipse occurs when the Moon passes through the Earth's shadow, which can only occur when the Moon is on the opposite side of the Earth from the Sun - which would normally be when we would see a Full Moon. Therefore, lunar eclipses can only occur during a Full Moon. Similarly, a solar eclipse occurs when the Moon passes in front of the Sun casting its shadow upon the surface of the Earth. This can only occur when the Moon is on the same side of the Earth as the Sun - which would normally be when there is a New Moon. The reason we don't normally get eclipses during Full and New Moons is because the Moon's orbit is tilted with respect to the Earth's orbit. During a Full Moon, the tilted path of the Moon usually takes it above or below the Earth's shadow and thus we get no lunar eclipse and just a normal Full Moon. During a New Moon, the tilted path of the Moon usually makes it such that the shadow of the Moon is cast above or below the surface of the Earth and thus we get no solar eclipse and just a normal New Moon.

However, during the two eclipse seasons the Moon's orbit is titled in such a way that it passes through the Earth's shadow and directly across the line of sight between the Earth and the Sun. If the Moon passes into a Full or New phase during this time an eclipse will occur. If a lunar and solar eclipse occur during the same season, they will be separated by about two weeks (the time it takes for the Moon to move from the opposite side of the Earth to the same side of the Earth as the Sun).

It depends on the time of day, and year, and solar cycle. Its never the same exact point. In a total eclipse, the photosphere (and everything inside that, such as the core) is blocked by the moon but the corona is visible.

Full Moons and New Moons are "eclipse season", since eclipses happen only at those times. They are the times when the sun earth and moon are closest to being in a straight line. So the tidal effects of the moon and the sun are working together. The sun's tidal effects on the earth are not very strong compared to the moon's, but they do have the effect of adding to the lunar tides as these times.

During a total solar eclipse, most of the visible light coming from the sun is blocked (from the point of view of those who can actually witness the eclipse). As a result, it is physically possible to look at the moon as it is blocking the sun. The problem is that your pupils will be relatively wide open, and non-visible radiation that is extremely harmful to the eyes will be able to pour into your eyes, and you will not feel it or sense it initially. The extreme pain/discomfort that you feel when your line of sight nears the visible sun is a very important reaction meant to keep you from being so foolish as to force yourself to look.

Don't look directly at the sun, and don't look directly at a solar eclipse. You could cause blindness or serious loss of vision by doing such things. There are materials that can be safely used, with supervision, to make these observations, and be sure that materials are safe before you use them.

In a solar eclipse, no sunlight penetrates the umbra. This is because the umbra is basically the shadow of the Earth, so in this case, the Earth is receiving the sunlight from the Sun, while both the umbra and moon are in the dark.

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It does not. There are generally two solar eclipses and two lunar eclipses each year. Because the alignment of the Earth, Moon and Sun is rarely precisely right, we sometimes get two partial eclipses instead of a single total eclipse, but on average, two per year.

During a solar eclipse the Moon come between the Sun and Earth casting a shadow on the Earth. During a lunar eclipse the Earth blocks the sunlight from illuminating the Moon.
A lunar eclipse is when the earth moves between the moon and the sun to make a shadow on the moon, a solar eclipse is where the moon gets between the earth and the sun and causes a shadow on the earth.

A solar eclipse is when the sun is blocked from view due to the moon passing exactly in front of the sun as it circles around the globe. However, since the earth moon and sun do not share the same orbital plane, this happens very rarely. You MUST wear special protective eye covering to directly observe a solar eclipse or you risk causing serious injury including blindness. Sunglasses, however good they are, DO NOT PROTECT YOUR EYES during a solar eclipse. Don't directly observe a solar eclipse unless you have guaranteed that your eye wear is certified to protect you.

A lunar eclipse is when the moon and sun are on opposite sides of the globe, and the moon is full. At this time, when the earth blocks sunlight from reaching the moon this is called a lunar eclipse. The moon will often appear red during a total lunar eclipse. For the same reason as a solar eclipse, this also happens very rarely, but more frequently at a given location than solar eclipses. It is safe to observe a lunar eclipse without any special protective covering for the eyes. Just remember that if you are looking at an eclipse at night, it is safe to view.

The term "Solar Eclipse" defines an alignment of the Sun, the Moon, and the Earth, such that the Moon is located between the Sun and the Earth, causing the Sun to be hidden from view on the Earth.

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