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Epoch (astronomy): Quiz


Question 1:
When was the Epoch (astronomy)?
11th century
January 2010

Question 2: Celestial ________ most commonly used in astronomy are equatorial coordinates and ecliptic coordinates.
Orthogonal coordinatesCoordinate systemSpherical coordinate systemCartesian coordinate system

Question 3: by the ________, nowadays often resolved into precessional components, separate precessions of the equator and of the ecliptic.
Axial precession (astronomy)SolsticeLongitudeIslamic calendar

Question 4: Julian Day Numbers, e.g., ________ 2433282.4235 for 1950 January 0.9235 TT
Gregorian calendarJulian dayJulian calendarCalendar

Question 5: It has been suggested that this may be related to the fact that the Egyptians regulated their year by the heliacal rising of the star ________, a phenomenon which occurs in the morning just before dawn.
SiriusAlpha CentauriBeta Canis MajorisVega

Question 6: due to precession), and there is an ________ number of such coordinate systems possible.
InfinityTransfinite numberLarge numbersGeorg Cantor

Question 7: This practice was followed in the Jewish and ________[13] and in Medieval Western Europe in reckoning the dates of religious festivals.
Gregorian calendarTimeIslamic calendarJulian calendar

Question 8: All three of these are expressed in TT = ________.
Barycentric Dynamical TimeTerrestrial TimeInternational Atomic TimeCoordinated Universal Time

Question 9: An example is as follows: For ________ (5145) Pholus, orbital elements have been given including the following data:[4]
Ceres (dwarf planet)CometMinor planetPluto

Question 10: to 12h on the Terrestrial Time scale on 2000 Jan 1, which occurred about 64 seconds sooner than noon ________ on the same date (see ΔT).
Tropical yearUniversal TimeCoordinated Universal TimeSidereal time


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