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The length of the total phase in a total solar eclipse varies with the exact geometry of the eclipse; where the Sun and Moon are relative to the Earth, how far away the Moon is, and where in the path of totality you are. But it is NEVER more than 7 minutes 30 seconds, and is often much shorter. For example, for the total solar eclipse on September 21, 2968, the maximum duration of totality was 40 seconds. A duration of 4-5 minutes is typical.
For total lunar eclipses, the total phase varies with the same factors, except that the maximum length of the total phase can be up to an hour and a half or more. For example, in the total lunar eclipse of June 15, 2011, the total phase will be 100 minutes, which is pretty close to the maximum.
What else can I help you with?
What is the plane of the earths orbit?
The plane of Earth's orbit is known as the ecliptic. It is the flat plane in space that represents the path along which the Earth travels around the Sun. The ecliptic is inclined at an angle of approximately 23.5 degrees to the celestial equator.
Which direction does summer migrate and why?
Twice a year, halfway between summer and winter, the Sun rises exactly in the east , and sets exactly in the west (well, nearly exactly, in both cases). We now know that on the days when this happen, day and night are very nearly equal in length, and that time of year is therefore called "equinox." One equinox happens in the fall ("autumnal equinox") and one in the spring ("vernal equinox," "ver" is Latin for spring). As fall advances towards winter, the location of sunrise moves south, as does the location of sunset. The steepness of the curve traced by the Sun does not change, nor does the rate ("speed") with which the Sun appears to move along it, but the length of the curve changes, it becomes shorter. Around December 21 --the "winter solstice" halfway between the equinox dates (typically, September 23 and March 21) sunrise and sunset are as far south as they can go (at any one location). As a result, the Sun has its shortest path for the year, the day is at its shortest and night is at its longest. Other days of that season are short, too, which is one reason for the colder weather in winter. In summer, the Sun's path is longest, and so are the days. In winter, the Sun's path is shortest, and so are the days. After that the points of sunrise and sunset migrate northward again, and days get longer. This migration continues past equinox (when it is at its fastest), and the Sun crosses the horizon furthest northwards around June 21, the "summer solstice" (celebrated in some cultures as "midsummer day"), longest day of the year with the shortest night. After that days get shorter again as sunset and sunrise migrate south again. The long days of summer, of course, match the warmer summer weather.
What will two species with a high degree of niche overlap do?
Mostly they will get along together, depending upon the species. Other wise they will not get along. Lions and Hyenas get along more or less, but do squabble. But cattle and lions or hyena do not get along, even though they occupy the same niche. By definition, carnivores must occupy some one else's niche. But in a field, cattle, horses and sheep will coexist happily. Birds by and large do not seem to have this coexistence philosophy.
How many faraheights equal one Celsius?
Oh, dude, you're hitting me with the temperature conversion question! So, like, one degree Celsius is equal to 1.8 degrees Fahrenheit. It's like they're distant cousins who don't really get along, but they have to hang out sometimes.
What mineral contains sodium and chlorine also breaks at 90 degree angles in three directions?
The mineral you are referring to is halite, commonly known as rock salt. It consists of sodium and chlorine atoms that are arranged in a cubic crystal structure, which causes it to break along 90-degree angles in three directions.
At noon on the vernal equinox the sun's vertical rays strike the earth along?
At noon on the vernal equinox, the sun's vertical rays strike the earth along the equator. This is when the lengths of day and night are nearly equal all over the world.
When does the vernal equinox 2010 occur in California?
The Vernal Equinox is a point in the sky along the 'track' that the sun appears to follow through the stars in the course of the year. In 2010, the center of the sun reached that point at 10:30 AM PST on March 20.
What travels on the ecliptic?
the sun travels along the ecliptic
Astronomers measure what kind of ascension eastward from the vernal equinox?
The question could have been written more clearly, I think.Anyway, the answer is "right ascension".That's one of the coordinatesused to define the positionof an objectin the sky on the "celestialsphere".It is angular distance, measuredeastward from the Vernalequinox, along the "celestialequator".
Why do fall and spring fall on the certain days that they do?
The beginnings of spring and fall/autumn (depending on where you are on the globe) are determined astronomically, and they occur at an exact moment, the same moment for everyone on Earth. The Vernal Equinox is the moment when spring begins in the northern hemisphere-- fall/autumn begins at this time in the southern hemisphere, and it is the moment that the center of the sun passes over the equator as it travels north along the ecliptic (the ecliptic is the imaginary path that describes the apparent motion of the sun during the course of the year)This happens in late March. The Autumnal equinox is when the center of the sun passes over the equator as it travels south along the ecliptic, in late September. This is the beginning of autumn for us in the north, and the beginning of spring for the southern hemisphere.
What path does Earth travel along?
The Earth travels along a path called the Ecliptic.
What a lie along the elliptic?
I think you mean the ecliptic. This refers to the paths of the planets as they orbit the sun. Also, the moon and movement of the sun are on the ecliptic when viewed from earth, which is why we get eclipses, from which the word 'ecliptic' is derived.
What is ecliptic in relationship to the sun and the earth?
Ecliptic means the imaginary line that marks the path the Sun moves on annually. The ecliptic path projects the Earth's orbit and along helps mark when eclipses will occur.
What are the dates of the twice yearly equinox?
It varies, mostly on how far along we are in the 4-year cycle of leap years and the 400-year cycle of leap centuries and on what part of the world you're asking about (although it's Friday morning where I live, it's Saturday in some parts of the world). Lately, in the U.S., the vernal equinox has been falling around March 20, and the autumnal equinox around September 22, although this year it's on the 23rd.
What period of time does the sun take to complete one trip around the sky along the ecliptic?
The sun takes about 365.25 days to complete one trip around the sky along the ecliptic, which is why we have a year with that duration.
Where is constellation Scorpio located?
Gemini is a zodiacal constellation in the northern hemisphere between Taurus and Cancer on the ecliptic.
What is the apparent speed of the sun along the ecliptic?
The apparent speed of the Sun along the ecliptic varies, because the Earth's orbit around the Sun is elliptical. The annual average speed is 360 degrees in 365.24 days, which is about 0.99 degrees per day. At a distance of 93 million miles, that translates to about 1.6 million miles per day, or about 67 thousand miles per hour.
