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Eclipse, the Java IDE
Until about the end of 2001, Visual Age for Java was IBM's strategic Java product. VAJ is one of several Java development IDEs, somewhat unique in that it stores the source code in a repository and lets the user work on packages, classes and methods rather than source files.

altitude -- the angle (in degrees) above the level horizon where an object in the sky appears. (The object's azimuth is also needed to pinpoint its position.) ...

Eclipses and Greenwich
Sir George Biddell Airy (1801-92), by Thomas Herbert Maguire [artist]; George Ransome [printer]; M & N Hanhart [printers], 1852 ...

Eclipses reveal first images of Sun's iron emission
Posted: 05 January 2010 ...

Eclipses In The News ...
Total Solar Eclipse Today Was Record Blackout at 6 minutes and 39 seconds
National Geographic - July 22, 2009
Metaphysics ...

~ at HighBeam Research
~ on Wikipedia
~. (Image by Lviatour, GFDL) ...

Saturn ~s an icy moon
The mighty planet Saturn is circled by a fleet of moons, each as different from the other as individual people. And as weird and alien as it seems, this Saturnian system of planet and moons have some similarities to our own Earth and Moon.

A celestial alignment in which two bodies lie on a line passing through the position of the observer. ~s may also occur involving when the shadow of the closer body occults the farther body. can occur only at , which occur on ...

Wikipedia, the free encyclopedia - Cite This Source
An ~ (Ancient Greek noun έκ"ειψις (kleipsis), from verb εκ"είπω (eklepō), "I vanish," a combination of prefix εκ- (ek-), from preposition εκ, εξ (ek, ex), "out, ...

~s of the Sun
Sometimes, the Moon passes between the Earth and the Sun. The Moon blocks the light of the Sun and a shadow of the Moon is cast on the Earth's surface. This is an ~ of the Sun, or a solar ~.

~ day on Lion Hill near Lake Nakuru, Kenya
Elephants on the Masai Mara
Baboons on the Masai Mara ...

The ~ at a Glance North America Other Event Time
EDT Time
CDT Time
MDT Time
PDT Time
Partial ~ Begins: ...

Solar ~s
A solar ~ occurs when the new Moon passes between the Sun and the Earth, casting a shadow on the Earth. There are three types of solar ~s: annular, partial, and total.

Solar ~
From Wikipedia, the free encyclopedia
Jump to: navigation, search ...

Solar ~ (not to scale)
As noted above, the images that we show in discussing ~s are illustrative but not drawn to scale. The true relative sizes of the Sun and Earth and Moon, and their distances, are very different than in the above figure.
Animations of Solar ~s ...

~s were, to the ancients, perhaps the most striking, important event in the heavens. Ritual and ceremony were practiced worldwide at the time of ~s, and many astrologers were executed for failing to predict ~s.

~s visible from Iowa are in bold
Time of Mid~ (GMT)
Iowa Time in Italics ...

~s are more spectacular because our Moon, which has a diameter 400 times smaller than our Sun, lies almost exactly 400 times closer.

Mid ~, or the ~'s deepest moment, comes at 11:40 p.m. Even at this dark hour, the northern (top) part of the Moon will likely look lighter than the southern (bottom) part, which passes more closely to, though above, the center of the Earth's shadow. (See map.)* ...

~s & Occultations, Orbits & Loops, Planetary Alignments, Tides & Quakes, Time & Motion ...

Solar ~
The sun is beginning to move out from behind the moon in this picture of a total ~. Image Credit: NASA
During a solar ~, the moon comes between the sun and Earth so that all or part of the sun's light is blocked from Earth.

Lunar ~s
A lunar ~ occurs during a Full Moon when the Earth is between the Sun and the Moon and when the Moon passes through some of the Earth's shadow..
Where Visible ...

Why Do ~s Happen? What Is an ~?
Grade Level: 3-5, 6-8
Lesson Time: Less Than 30 Minutes
Body: Sun, Earth, Earth's Moon
Mission: Apollo Program (Earth's Moon), Earth Science Missions (Earth), Heliophysics Missions (Sun) ...

A lunar ~ occurs when the Earth's shadow falls on the moon. Lunar ~s occur, on average, about every 6 months.
Types of Lunar ~s ...

Martian Solar ~s
The shadow of the Martian moon, Phobos, is captured here by the Mars Global Surveyor wide angle camera. Frequent solar ~s are caused by the passage of Phobos between Mars and the Sun.

Total Solar ~
Taken at 3:01pm 21/06/01 Chinyingi, Zambia with an Elite 200, Meade 2045D 1 sec.

The longest solar ~s occur when the Earth is at aphelion (farthest from the Sun, making the solar disc smaller) and the Moon is at perigee (closest to the Earth, making the Moons apparent diameter larger).

From time to time"but only at new or full Moon"the Sun and the Moon line up precisely as seen from Earth, and we observe the spectacular phenomenon known as an ~.

~ Web Sites
The following sites are probably the best and most complete ones on the web. You'll find ~ predictions, photographs, observing instructions, and fairly complete indexes of all high-quality ~ sites on the web.

~ - Obscuring of one celestial body by another, either by direct superposition or by the casting of a shadow. Solar ~s are of three kinds, total (when the Moon completely ~s the Sun), annular (when a complete ring of sunlight escapes around the edge of the Sun), and partial.

(a) Occultation of one celestial body by another which passes between it and the observer. The Solar ~ is caused by the passing of the Moon between the Sun and the Earth in this way; such an ~ may be complete (total) or incomplete (partial).

~. ~s occur when the Sun, Moon, and Earth precisely line up. The Moon, in its orbit around the Earth, is inclined at about 5 degrees to the ecliptic (the plane at which the Earth orbits the Sun). Therefore the Moon spends most of its time above or below the ecliptic plane.

The passage of one object in front of another (as the Moon passes in front of the Sun during an ~ of the Sun), or the passage of one object through the shadow of another (as the Moon passes through the shadow of Earth during an ~ of the Moon).

~ An alignment of two bodies with the observer such that either the nearer body prevents the light from the further body from reaching the observer (strictly speaking, these are occultations), e.g.

~- when one celestial body passes in front of another, dimming or obscuring its light (e.g. solar, lunar, and eclipsing binaries)
Ecliptic- the apparent yearly path of the sun against the stars ...

The event in which one celestial body passes in front of another, blocking the light from the more distant object. An ~ can refer to the Moon passing in front of the Sun, but can also be applied to a star in a binary system which passes in front of the other star.

When one object passes in front of another as seen from the Earth. The term is usually used when the two objects are of roughly the same angular size, as in an ~ of the Sun by the Moon.

The cutting off, or blocking, of light from one celestial body by another.
The plane of Earth's orbit about the Sun ...

The cutting off of part or all the light from one celestial object by another.
eclipsing binaries
Binary star systems in which, as seen from Earth, the stars periodically pass in front of each other.

the total or partial blocking of one celestial body by another.

~ Year
The 346.62 days it takes the sun to return to a node
Eclipsing Binary ...

~, solar. The passage of the Moon in front of the Sun so that the Moon is directly in front of the Sun. Totality may last for a little over 7 minutes under favourable conditions. Partial ~s occur when the Sun is incompletely covered.

~ season: That period when the sun is near a node of the moon's orbit and ~s are possible.
~ year: The time the sun takes to circle the sky and return to a node of the moon's orbit; 346.62 days.

~ Track - The path of the Moon's shadow across the Earth during a solar ~
~ Year - The interval of time (346.6 days) from one passage of the Sun through a node of the Moon's orbit to the next passage through the same node ...

Total or partial masking of a celestial body by another along the line of sight. Solar ~s result from the Moon blocking the Sun relative to the Earth; thus Earth, Moon and Sun all lie on a line.

"~" is the tenth and final track from United Kingdom progressive rock band Pink Floyd's 1973 in music album, The Dark Side of the Moon....
". Video is not available of this event, but a link to audio is present below. Adams chose the name for Pink Floyd's 1994 album, The Division Bell ...

The ~
In a total ~ of the Sun, the Moon just barely covers the Sun. The Sun itself is so distant that when viewed from anywhere on Earth, it covers practically the same patch of the sky, with a width of about 0.5.

This ~ is History
A NASA scientist views the ~ from the foothills of Transylvania, home of ancient legends and modern science. Includes video replays from NASA TV and an audio account of the ~ as seen from Romania.
Snagging a High Fly Ball ...

Lunar ~
An ~ of the Moon can only occur at FULL MOON and only if the Moon passes through some portion of the Earth's shadow (see diagram 2 under phases of the Moon).
A TOTAL ~ happens when the entire Moon passes through Earth's umbral shadow (see diagram below).

Toward ~ Mapping of Hot Jupiters
ApJ., 664, 1199
paper ...

Annular ~ - a type of solar ~ in which a ring (annulus) of sunlight remains visible.
Asteroid - a "minor planet" ,a chunk of rock smaller than planet-size but larger than a meteoroid, in orbit around a star.

The blocking of some or all of the light from one object by another. This ~ image is courtesy of NASA DFRC.

~s (Part 1) (Check the study guide for this lesson)
~s are a very important part of astronomy. To understand them you have to learn the fundamentals of the geometry of orbits and the physics of shadows. That's what this lesson will teach you.

~ Event during which one body passes in front of another, so that the light from the occulted body is blocked.
eclipsing binary Rare binary-star system that is aligned in such a way from Earth we observe one star pass in front of the other, eclipsing the other star.

~s and Mutual Events (supplement), by Arlot and Thuillot
Satellite Photometry, by D. Tholen
Visual Imaging, by S. Larson ...

An ~ happens when the moon blocks the Sun or the Earth's shadow falls on the moon.
Some Eclipsing Binaries Magnitude Range Period
Delta Librae ...

When our view of one object in the sky is blocked by either another object, or the Earths shadow.
Ecliptic ...

~ - (n.)
The hiding of one celestial body by another. The hiding of a star by a body of larger angular size is usually called an occultation.
ecliptic - (n.) ...

An ~ in which the Moon passes through the shadow cast by the Earth.

Solar ~s can only occur within a few days of the New Moon, but they do not happen at every New Moon. This is due to the 5.1 degree tilt of the Moon's orbit around the Earth compared to the Earth's orbit around the Sun.

Solar ~
A phenomenon in which the Moon's disk passes in front of the Sun, blocking sunlight. A total ~ occurs when the Moon completely obscures the Sun's disk, leaving only the solar corona visible. A solar ~ can only occur during a new phase of the Moon.
Triton ...

A solar ~ occurs when a new moon passes between the Sun and Earth, and are usually defined as either total, partial, or annular. These natural phenomenona take place on average twice each year, but with the rarer total solar ~s happening about once every 1.5 years.

During an ~, about 25% of the diameter of one star is covered by the other, and the brightness of the pair of stars decreases by about 0.09 magnitudes.

K. A lunar ~ is the opposite of a solar ~. Instead of the moon moving between the earth and the sun (a solar ~) casting its shadow on earth, the earth comes between the sun and the moon casting its shadow over the moon.

A secondary ~ occurs when the primary component occults the dimmer star. Algol is a prototype for a class of stars known as Algol variables.
Algol A belongs to the spectral class B8V, Algol B to K0IV, and Algol C to A5V.

annular ~ An ~ in which a thin ring of the source of light appears around the obscuring body. anode The positive pole or electrode of any electron emitter, such as an electron tube or an electric cell.
The negative pole or electrode is called a cathode.

~ (NASA Thesaurus / NASA SP-7, 1965) 1. The reduction in visibility or disappearance of a nonluminous body by passing into the shadow cast by another nonluminous body.

partial ~ Pauli exclusion principle peculiar galaxy abnormally shaped galaxy that emits nonthermal radiation. penumbra portion of the shadow from which part of the light source is excluded when a body passes over the light source.

Annual ~
A type of total ~ in which the moon is too far from the earth to totally cover the suns surface. A ring of the photosphere surrounds the moon during mid~. The corona is not visible and neither are the prominence because of the glare from the photosphere.
Anorthosite ...

The resultant light curve shows primary ~s when the dimmer star passes in front of the brighter star and a scondary ~ or minimum when the brighter star ~s the dimmer star. The component stars in an eclipsing binary are generally close to each other.

F CORONA Of the white-light CORONA (that is, the corona seen by the eye at a total solar ~), that portion which is caused by sunlight scattered or reflected by solid particles (dust) in interplanetary space. F REGION (Also F LAYER).

It is visible to the naked eye during a solar ~.
Density The amount of mass or number of particles per unit volume. In cgs units mass density has units of gm cm-3. Number density has units cm-3 (particles per cubic centimeter).

2136 BC - Chinese astronomers record a solar ~
586 BC - Thales of Miletus predicts a solar ~
350 BC - Aristotle argues for a spherical Earth using lunar ~s and other observations ...

5 years these two stars revolve and ~ each other. Without additional help the variation in brightness cannot be seen because it is just about a few tenth of a mag.

95026 days they ~ each other, the main ~ yielding a dip of about 0.2 magnitudes.

8 mag as the brighter component is then ~d by the darker companion. This ~ lasts a full year (the last ~ took place in 1983). Caculations show that the dark component of epsilon Aur has about 10 -12 solar masses.

This is called a solar ~; if the alignment is slighly imperfect then the Moon covers only part of the Sun's disk and the event is called a partial ~. When it lines up perfectly the entire solar disk is blocked and it is called a total ~ of the Sun.

Although the Sun's corona has been observed during total ~s of the Sun for thousands of years, the existence of coronal mass ejections was unrealized until the space age.

Astronomers have also observed that planet b is ~d by its star by about two minutes (120 +/- 24 seconds) later than would be expected if it has a perfectly circular orbit.

Hipparchus followed the method used by Aristarchus, a procedure that depends upon measuring the breadth of the Earth's shadow at the distance of the Moon (the measurement being made by timing the transit of the shadow across the Moon's disk during a lunar ~).

A coronograph creates an artificial ~ by covering the bright disk of the sun allowing study of the corona. Periodically, a huge cloud of gas with frozen-in magnetic field lines is ejected from the Sun over several hours. These clouds are called coronal mass ejections or CME's.

Finally the outermost layer of the Sun is the corona, a region of diffuse glowing gas which can only be seen from Earth when the much brighter glare from the Sun is blocked by a solar ~.

Piccillo met for the July lunar ~. Boy was that fun. We sat in a Springfield street to watch this fantastic occurrence. There was a camera for each of us, however, out results were disappointing.

An expedition to a solar ~ in 1919 measured this larger value for the deflection. Currently the deflection of "light" is best measured using radio astronomy, since radio waves can be measured during the day without waiting for an ~ of the Sun. Lebach et al.

The rover's panoramic camera recorded the images as the first in a series of ~ observations by both Opportunity and Spirit. The irregularly shaped moon Deimos is only 9 miles across in its longest dimension so it appears as just a speck in front of the disc of the Sun.

After Ptolemy, Greek astronomy went into permanent ~. By the eighth century AD the centre of astronomy had moved east from Alexandria to Baghdad where Ptolemy's work was translated into Arabic and received the name Almagest by which we still know it.

1919 - The English astrophysicist Arthur Eddington uses his measurements of an ~ to confirm the deflection of starlight by the gravity of the Sun as predicted in Albert Einstein's General Theory of Relativity.

This makes the total light from the system seem to vary with time---it is dimmer during ~ and brighter when the system is out of ~.

The maximum brightness occurs of course when the two are not ~d, with each one adding its luminosity to the total output. Two minima also occur: the principal minimum is when the companion blocks out the primary; while a secondary minimum occurs when the companion is ~d by the primary.

Another way to look at the corona is to artificially block the bright light of the photosphere, to create the same effect as an ~. This is done using an instrument called a coronagraph, which produces images similar to that shown above on the right.

Mediante el estudio de ~s y el movimientos de los planetas, eventualmente los astrnomos se dieron cuenta de que la gravedad controla la forma como se mueven las cosas, y que gravedad era responsable del movimiento del Sol, la Luna, y las estrellas en nuestro cielo.

Excellent for ~, solar or lunar imaging.
Fixed to scope compared to hand held camcorder-to-eyepiece.
Hard to adjust picture (Astrovid or camcorder works better on planets. Modifications are only marginal.)
Mechanical connections
Summary ...

The planets orbit the Sun in or near the same plane, called the ecliptic (because it is where ~s occur). Pluto is a special case in that its orbit is the most highly inclined (17 degrees) and the most highly elliptical of all the planets. Its orbit is more typical of a Kuiper Belt Object.

immersion; ingress ((astronomy) the disappearance of a celestial body prior to an ~)
egress; emersion ((astronomy) the reappearance of a celestial body after an ~)
ascension ((astronomy) the rising of a star above the horizon) ...

Let's say you are located in Hong Kong (+8 hours) and you want to see an ~ that is scheduled to start on the 15th of the month at 18:00 UTC. Adding 8 to 18 will give you 26:00 or 2AM the NEXT day - the 16th.

One of the Sun's outer layers, visible for a few minutes as a spectacular halo during during a total ~ of the Sun.
A reddish-colored layer in the solar atmosphere, just above the photosphere.

Beta Aurigae is an eclipsing binary star, and its apparent magnitude varies over a period of 3.96004 days between +1.85 and +1.93, as every 47.5 hours one of the stars partially ~s the other from Earth's perspective.
Alhena ...

is more useful for timing dynamic events, such as occultations or ~s, or for meteor shower counts. Lastly, do not forget to record whether the time is Eastern Daylight Time (EDT) or Eastern Standard Time (EST).

4 (about a third) over a few hours and is faint for two hours before gradually brightening again, The ~ take about 10 hours in all and happens every 2.87 days (68.8 hours).

See also: See also: What is the meaning of Astro, Earth, Solar, Sun, Planet?

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