Eclipse

eclipsestotal eclipseeclipsingtotalpartialTotalitycoveringEclipse (software)eclipse of the sunin the shadow of Jupiter
An eclipse is an astronomical event that occurs when an astronomical object is temporarily obscured, either by passing into the shadow of another body or by having another body pass between it and the viewer.wikipedia
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Eclipse season

this chart
For the special cases of solar and lunar eclipses, these only happen during an "eclipse season", the two times of each year when the plane of the Earth's orbit around the Sun crosses with the plane of the Moon's orbit around the Earth.
An eclipse season is one of only two periods during each year when eclipses can occur, due to the variation in the orbital inclination of the Moon.

Eclipse cycle

eclipsestetradeclipse cycles
An eclipse cycle takes place when eclipses in a series are separated by a certain interval of time.
Eclipses may occur repeatedly, separated by certain intervals of time: these intervals are called eclipse cycles.

Saros (astronomy)

SarosSeriesSeries (and member)
A particular instance is the saros, which results in a repetition of a solar or lunar eclipse every 6,585.3 days, or a little over 18 years.
The saros is a period of approximately 223 synodic months (approximately 6585.3211 days, or 18 years, 11 days, 8 hours), that can be used to predict eclipses of the Sun and Moon.

Transit (astronomy)

transittransitingtransits
An eclipse is the result of either an occultation (completely hidden) or a transit (partially hidden).
As viewed from a particular vantage point, the transiting body appears to move across the face of the larger body, covering a small portion of it.

Transient astronomical event

transientastronomical eventastronomical transient
An eclipse is an astronomical event that occurs when an astronomical object is temporarily obscured, either by passing into the shadow of another body or by having another body pass between it and the viewer.
Singularly, the term is used for violent deep-sky events, such as supernovae, novae, dwarf nova outbursts, gamma-ray bursts, and tidal disruption events, as well as gravitational microlensing, transits and eclipses.

Magnitude of eclipse

Mag.magnitudeeclipse magnitude
The eclipse magnitude is the fraction of the Sun's diameter that is covered by the Moon.
The magnitude of eclipse is the fraction of the angular diameter of a celestial body being eclipsed.

Syzygy (astronomy)

syzygysyzygiesplanetary alignment
This alignment of three celestial objects is known as a syzygy.
Solar and lunar eclipses occur at times of syzygy, as do transits and occultations.

Umbra, penumbra and antumbra

umbrapenumbraantumbra
The umbra, within which the object completely covers the light source. For the Sun, this light source is the photosphere.
An observer in the umbra experiences a total eclipse.

Binary star

spectroscopic binaryeclipsing binarybinary
A binary star system can also produce eclipses if the plane of the orbit of its constituent stars intersects the observer's position. The result is a type of extrinsic variable star system called an eclipsing binary.
If a binary star happens to orbit in a plane along our line of sight, its components will eclipse and transit each other; these pairs are called eclipsing binaries, or, as they are detected by their changes in brightness during eclipses and transits, photometric binaries.

Solar eclipse

solar eclipsessolareclipse
The term eclipse is most often used to describe either a solar eclipse, when the Moon's shadow crosses the Earth's surface, or a lunar eclipse, when the Moon moves into the Earth's shadow.
In a total eclipse, the disk of the Sun is fully obscured by the Moon.

Mursili's eclipse

launches a campaign
Mursili's eclipse
It is now more commonly identified as the one of 24 June 1312, which was visible in totality in northern Anatolia in the afternoon.

Transit of Deimos from Mars

transits of Deimostransit of Deimos
Sun - Deimos - Mars: Transit of Deimos from Mars | Solar eclipses on Mars
The event could also be referred to as a partial eclipse of the Sun by Deimos.

Ecliptic

ecliptical orbitsecliptic planeplane of the ecliptic
Because the orbital plane of the Moon is tilted with respect to the orbital plane of the Earth (the ecliptic), eclipses can occur only when the Moon is close to the intersection of these two planes (the nodes).
Because the orbit of the Moon is inclined only about 5.145° to the ecliptic and the Sun is always very near the ecliptic, eclipses always occur on or near it. Because of the inclination of the Moon's orbit, eclipses do not occur at every conjunction and opposition of the Sun and Moon, but only when the Moon is near an ascending or descending node at the same time it is at conjunction or opposition.

Ole Rømer

Ole Christensen RømerOlaus RoemerRoemer, Olaus
Ole Rømer deduced that the delay was caused by the time needed for light to travel from Jupiter to the Earth.
Rømer observed immersions in C from the symmetric positions F and G, to avoid confusing eclipses (Io shadowed by Jupiter from C to D) and occultations (Io hidden behind Jupiter at various angles).

Orbital node

Nodeascending nodenodes
Because the orbital plane of the Moon is tilted with respect to the orbital plane of the Earth (the ecliptic), eclipses can occur only when the Moon is close to the intersection of these two planes (the nodes).
Eclipse

Variable star

variablevariable starsvariability
The result is a type of extrinsic variable star system called an eclipsing binary.
When seen from certain angles, one star may eclipse the other, causing a reduction in brightness.

Algol variable

AlgolAlgol-typeAlgol type
Algol variables or Algol-type binaries are a class of eclipsing binary stars that are related to the prototype member of this class, β Persei (Beta Persei, Algol) from an evolutionary point of view.

List of Puerto Rican scientists and inventors

Carlos Ortiz LongoJorge N. Amely VélezAerospace
In 1581, Juan Ponce de León II, the grandson of the Conquistador Juan Ponce de León, studied an eclipse and its effects on the island and was able to establish the exact geographical coordinates of San Juan with his observations.

Antikythera mechanism

Orrery
The Antikythera mechanism is an ancient Greek analogue computer used to predict astronomical positions and eclipses for calendar and astrological purposes decades in advance.

Canon of Kings

Canon of PtolemaeusPtolemaic CanonPtolemy's Canon
The Canon of Kings was a dated list of kings used by ancient astronomers as a convenient means to date astronomical phenomena, such as eclipses.

Timeline of astronomy

Timeline
In 6th century BC Greece, this knowledge is used to predict eclipses.

Solar eclipse of May 12, 1706

1706 May 12on 12 May of that year
The solar eclipse on May 12, 1706 was a total eclipse.

1970 in television

19701973March 1970
March 7 – The "eclipse of the century" is covered by all three American networks.

Grahana (novel)

Grahana
Grahana (meaning: Eclipse) is a novel written by S.L. Bhyrappa, which was first published in 1972.