Ένα σημείο για την Σταύρωση είναι η έκλειψη Σελήνης. Αυτός φαίνεται να είναι ένας επιπλέον λόγος να κωδικοποιηθούν αστρονομικά στοιχεία της Σελήνης.
Astronomical analysis
Newton's method
Isaac Newton deduced a methodology to date the crucifixion.
All four Gospels agree to within about a day that the crucifixion was at the time of Passover, and all four Gospels agree that Jesus died a few hours before the commencement of the Jewish Sabbath, i.e. he died before nightfall on a Friday (Matt 27:62; 28:1; Mark 15:42; Luke 23:54; John 19:31, 42). In the official festival calendar of Judaea, as used by the priests of the temple, Passover time was specified precisely. The slaughtering of the lambs for Passover occurred between 3pm and 5pm on the 14th day of the Jewish month Nisan (corresponding to March/April). The Passover meal commenced at moonrise (necessarily a full moon) that evening, i.e., at the start of 15 Nisan (the Jewish day running from evening to evening) (Leviticus 23:5; Numbers 28:16). There is an apparent discrepancy of one day in the Gospel accounts of the crucifixion which has been the subject of considerable debate. In John's Gospel, it is stated that the day of Jesus' trial and execution was the day before Passover (John 18:28 and 19:14), Hence John places the crucifixion on 14 Nisan. Likewise the Apostle Paul, in his First Epistle to the Corinthians, implies Jesus died on a 14 Nisan ("sacrificed as a Passover lamb", 1 Cor 5:7), and was resurrected on the Jewish festival of the first fruits, i.e. on a 16 Nisan (1 Cor 15:20). The correct interpretation of the Synoptics is less clear. Thus some scholars believe that all 4 Gospels place the crucifixion on Friday, 14 Nisan, others believe that according to the Synoptics it occurred on Friday, 15 Nisan. The problem that then has to be solved is that of determining in which of the years of the reign of Pontius Pilate (AD 26–36) the 14th and 15th Nisan fell on a Friday.
In a paper published posthumously in 1733, Isaac Newton considered only the range AD 31–36 and calculated that the Friday requirement is met only on Friday 3 April AD 33, and 23 April AD 34. The latter date can only have fallen on a Friday if an exceptional leap month had been introduced that year, but this was favoured by Newton. In the twentieth century, the standard view became that of J. K. Fotheringham, who in 1910 suggested 3 April AD 33 on the basis of its coincidence with a lunar eclipse. In 1933, António Cabreira, following a similar method, arrived at the same date, as did, in the 1990s, Bradley E. Schaefer and J. P. Pratt. Also according to Humphreys and Waddington, the lunar Jewish calendar leaves only two plausible dates within the reign of Pontius Pilate for Jesus' death, and both of these would have been a 14 Nisan as specified in the Gospel of John: Friday 7 April AD 30, and Friday 3 April AD 33.
A more refined calculation takes into account that the Jewish calendar was based not on astronomical calculation but on observation, following criticism that it is possible to establish the phase of the moon on a particular day two thousand years ago but not whether it was obscured by clouds or haze. Including the possibility of a cloudy sky obscuring the moon, and assuming that the Jewish authorities would be aware that lunar months can only be either 29 or 30 days long (the time from one new moon to the next is 29.53 days), then the refined calculation states that the Friday requirement might also have been met, during Pontius Pilate's term of office, on 11 April AD 27. Another potential date arises if the Jewish authorities happened to add an irregular lunar leap month to compensate for a meteorologically delayed harvest season: this would yield one additional possibility during Pilate's time, which is Newton's favoured date of 23 April AD 34. Colin Humphreys calculates but rejects these AD 27 and AD 34 dates on the basis that the former is much too early to be compatible with Luke 3:1–2, and spring AD 34 is probably too late to be compatible with Paul's timeline, confirming Friday 7 April AD 30, and Friday 3 April AD 33 as the two feasible crucifixion dates.
Eclipse method
Lunar eclipse, 21 January 2019. Red hue caused by diffraction of sunlight through Earth's atmosphere.
A lunar eclipse is potentially alluded to in Acts of the Apostles 2:14–21 ("The sun shall be turned into darkness, And the moon into blood, Before the day of the Lord come"), as pointed out by physicist Colin Humphreys and astronomer Graeme Waddington. There was in fact a lunar eclipse on 3 April AD 33, a date which coincides with one of Newton's astronomically possible crucifixion dates (see above). Humphreys and Waddington have calculated that in ancient Jerusalem this eclipse would have been visible at moonrise at 6.20pm as a 20% partial eclipse (a full moon with a potentially red "bite" missing at the top left of the moon's disc). They propose that a large proportion of the Jewish population would have witnessed this eclipse as they would have been waiting for sunset in the west and immediately afterwards the rise of the anticipated full moon in the east as the prescribed signal to start their household Passover meals. Humphreys and Waddington therefore suggest a scenario where Jesus was crucified and died at 3pm on 3 April AD 33, followed by a red partial lunar eclipse at moonrise at 6.20pm observed by the Jewish population, and that Peter recalls this event when preaching the resurrection to the Jews (Acts of the Apostles 2:14–21). Astronomer Bradley Schaefer agrees with the eclipse date but disputes that the eclipsed moon would have been visible by the time the moon had risen in Jerusalem.
A potentially related issue involves the reference in the Synoptic Gospels to a three-hour period of darkness over the whole land on the day of the crucifixion (according to Luke 23:45 τοῦ ἡλίου ἐκλιπόντος – the sun was darkened). Although some scholars view this as a literary device common among ancient writers rather than a description of an actual event, other writers have attempted to identify a meteorological event or a datable astronomical phenomenon which this could have referred to. It could not have been a solar eclipse, since this could not take place during the full moon at Passover, and in any case solar eclipses take minutes, not hours. In 1983, astronomers Humphreys and Waddington noted that the reference to a solar eclipse is missing in some versions of Luke and argued that the solar eclipse was a later faulty scribal amendment of what was actually the lunar eclipse of AD 33. This is a claim which historian David Henige describes as "undefended" and "indefensible". Humphreys and a number of scholars have alternatively argued for the sun's darkening to have been caused by a khamsin, i.e. a sand storm, which can occur between mid-March and May in the Middle East and which does typically last for several hours.
In a review of Humphreys' book, theologian William R Telford points out that the non-astronomical parts of his lunar eclipse argument are based on the assumption that the chronologies described in the New Testament are historical and based on eyewitness testimony, accepting uncritically statements such as the "three different Passovers in John" and Matthew's statement that Jesus died at the ninth hour. He also alleges that Humphreys uses two very dubious sources, namely Pilate's alleged letter to Tiberius and the writings of the fifth-century Bishop Cyril of Alexandria, which Humphreys however classifies as forgery or contemporary interpretation indicative of a tradition at the time.
Double Passover method
The rising full moon at sunset signals the start of the Passover meal. This is two weeks after the new moon has heralded the start of the month of Nisan (March/April).
In the crucifixion narrative, the synoptic gospels stress that Jesus celebrated a Passover meal (Mark 14:12ff, Luke 22:15) before his crucifixion, which contrasts sharply with the independent gospel of John who is explicit that the official "Jewish" Passover (John 11:55) started at nightfall after Jesus' death. In his 2011 book, Colin Humphreys proposes a resolution to this apparent discrepancy by positing that Jesus' "synoptic" Passover meal in fact took place two days before John's "Jewish" Passover because the former is calculated by the putative original Jewish lunar calendar (itself based on the Egyptian liturgical lunar calendar putatively introduced to the Israelites by Moses in the 13th century BC, and still used today by the Samaritans). The official "Jewish" Passover in contrast was determined by a Jewish calendar reckoning which had been modified during the Babylonian exile in the 6th century BC. This modified Jewish calendar is in use among most Jews today. One basic difference lies in the determination of the first day of the new month: while the Samaritans use the calculated (because by definition invisible) new moon, mainstream Jews use the first observation of the thin crescent of the waxing moon which is on average 30 hours later. The other basic difference lies in the fact that the Samaritan calendar uses a sunrise-to-sunrise day, while the official Jewish calendar uses a sunset-to-sunset day. Due to these differences, the Samaritan Passover is normally one day earlier than the Jewish Passover (and in some years two or more days earlier). The crucifixion year of Jesus can then be calculated by asking the question in which of the two astronomically possible years of AD 30 and AD 33 is there a time gap between the last supper and the crucifixion which is compatible with the gospel timeline of Jesus' last 6 days. The astronomical calculations show that a hypothetical AD 30 date would require an incompatible Monday Last Supper, while AD 33 offers a compatible Last Supper on Wednesday, 1 April AD 33, followed by a compatible crucifixion on Friday, 3 April AD 33.
Given these assumptions he argues that the calculated date of Wednesday 1 April AD 33 for the Last Supper allows all four gospel accounts to be astronomically correct, with Jesus celebrating Passover two days before his death according to the original Mosaic calendar, and the Jewish authorities celebrating Passover just after the crucifixion, using the modified Babylonian calendar. In contrast, the Christian church tradition of celebrating the Last Supper on Maundy Thursday would be an anachronism. The calculated chronology incidentally supports John's and Paul's narratives that Jesus died at the same hour (Friday 3pm) on 3 April AD 33 that the Passover lambs were slaughtered.
In a review of Humphreys' book, theologian William R Telford counters that the separate day schema of the Gospel's Holy Week "is an artificial as well as an inconsistent construction". As Telford had pointed out in his own book in 1980, "the initial three-day structure found in {Mark 11} is occasioned by the purely redactional linkage of the extraneous fig-tree story with the triumphal entry and cleansing of the temple traditions, and is not a chronology upon which one can base any historical reconstructions."
