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  1. Heliacal rising - Wikipedia

    • The heliacal rising of a star or a planet occurs annually when it becomes visible above the eastern horizon at dawn just before sunrise (thus becoming "the morning star"). A heliacal rising marks the time when a star or planet becomes visible for the first time again in the night sky after having set with the Sun at the western horizon in a previous sunset (its heliaca… See more

    Cause and significance

    Relative to the stars, the Sun appears to drift eastward about one degree per day along a path called the ecliptic because … See more

    Non-application to circumpolar stars

    Some stars, when viewed from latitudes not at the equator, do not rise or set. These are circumpolar stars, which are either always in the sky or never. For example, the North Star (Polaris) is not visible in Australia and the … See more

    History

    Constellations containing stars that rise and set were incorporated into early calendars or zodiacs. The Sumerians, Babylonians, Egyptians, and Greeks all used the heliacal risings of various stars for the timing of agricultural … See more

    Acronycal and cosmic(al)

    The rising of a planet above the eastern horizon at sunset is called its acronycal rising, which for a superior planet signifies an opposition, another type of syzygy. When the Moon has an acronycal rising, it will occur near … See more

    See also
     
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  2. A heliacal rising marks the time when a star or planet becomes visible for the first time again in the night sky after having set with the Sun at the western horizon in a previous sunset (its heliacal setting), having since been in the sky only during daytime, obscured by sunlight.
    Learn more:
    A heliacal rising marks the time when a star or planet becomes visible for the first time again in the night sky after having set with the Sun at the western horizon in a previous sunset (its heliacal setting), having since been in the sky only during daytime, obscured by sunlight.
    en.wikipedia.org/wiki/Heliacal_rising
    Heliacal risings occur after a star has been behind the Sun for a season and it is just returning to visibility. There is one morning, just before dawn, when the star suddenly reappears after its absence.
    solar-center.stanford.edu/AO/dawn-rising.html
    Heliacal rising is a phenomenon by which a star becomes visible after being behind the Sun for a certain period of time. Just before sunrise, on the event of a heliacal rising, the star will shine above the eastern horizon, when the sun is about 10 degrees below the horizon.
    Heliacal rising refers to the first visible appearance of a celestial object, such as a star or planet, above the eastern horizon just before sunrise. This event marks the object's reemergence from the Sun's glare, making it observable to the naked eye.
    library.fiveable.me/key-terms/intro-astronomy/helia…
    When the Sun has separated from the star by somewhere between 8-20 degrees of zodiacal longitude the star begins to emerge, briefly, immediately before sunrise - its first brief appearance being known as its heliacal rising. © Skyscript.
    www.skyscript.co.uk/glossary/heliacal-rising-setting/
     
  3. Show Me a Dawn, or "Heliacal," Rising - Stanford University

     
  4. 2024: Heliacal Rising of Sirius - When the Curves Line …

    May 23, 2024 · For 2024, the following table, based on astronomer Jean Meeus’ equations, shows the predicted heliacal rising for Sirius for selected northern hemisphere latitudes. Begin looking for it at 50 minutes before sunrise a day …

  5. Sirius – Heliacal Rising & Setting – 800 BC – 2000 AD

    The “heliacal rising” is the first day when the star rises and the Sun is far enough below the eastern horizon to make it visible in the morning twilight. In the same way, the “heliacal setting” is the last day when the star sets and the Sun is far …

  6. The return of Sirius in the morning signals seasonal change

  7. Heliacal and Acronychal Risings and Settings - GeoAstro

    The "heliacal rising " (morning first): is the first day of the year when the star (after a period when it was invisible) rises in the morning before the Sun and the Sun is still far enough below the eastern horizon to make it briefly visible in the …

  8. What is Heliacal Rising – Heliacal Rising of Sirius the Star

  9. A Real Scorcher! — Sirius At Heliacal Rising - Sky

    Aug 10, 2016 · Assuming transparent skies and a minimum altitude of about 2°-3° for sighting Sirius, the heliacal rising of the star would occur with the Sun about 7° below the horizon. For current day Cairo at latitude +30° N, this occurs on the …

  10. The critical concept of heliacal rising - Star Myths of …

    Aug 2, 2011 · The first return of a star on the eastern horizon just prior to sunrise, after its annual period of absence due to the interference of the sun, is known as the heliacal rising.

  11. Heliacal risings and settings - Universal Workshop

    The heliacal rising of a star is the first occasion on which it is seen briefly in the dawn sky, before the rising of the Sun (Greek hêlios). From then on, as the Sun progresses away eastward, the star will be each day slightly farther from the …

  12. Astrology Heliacal Risings and Settings - © Dr …

    Heliacal means 'near the Sun', from the Greek for Sun, Helios. On the day of helical rising the star glimmers near the eastern horizon a minute or two before the Sun's light drown out the stars. The next day it will be visible in the night …

  13. Heliacal Risings and Ancient Astronomy - UCL

  14. The star Sirius in ancient Egypt and Babylonia - Gautschy

  15. Glossary of astrological terms :: Heliacal Rising / Setting - Skyscript

  16. Heliacal Rising - (Intro to Astronomy) - Vocab, Definition

  17. Birth Chart Calculator - Find Your Sun, Moon and Ascendant …

  18. The Heliacal Rising of Sirius and Ancient Timekeeping

  19. 5 Key Heliacal Risings: Timekeeping in the Ancient Greek Calendar

  20. Your Sun, Moon, Rising Signs Explained - Parade

  21. Rising Sign Calculator - SunSigns.Org