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  2. List of stars for navigation - Wikipedia

    en.wikipedia.org/wiki/List_of_stars_for_navigation

    The two brightest northern stars are Vega and Capella. In the star chart to the right, declination is shown by the radial coordinate, starting at 90° north in the center and decreasing to 30° north at the outer edge. Sidereal hour angle is shown as the angular coordinate, starting at 0° at the left of the chart, and increasing counter-clockwise.

  3. Orion (constellation) - Wikipedia

    en.wikipedia.org/wiki/Orion_(constellation)

    In the period May–July (summer in the Northern Hemisphere, winter in the Southern Hemisphere), Orion is in the daytime sky and thus invisible at most latitudes. However, for much of Antarctica in the Southern Hemisphere's winter months, the Sun is below the horizon even at midday. Stars (and thus Orion, but only the brightest stars) are then ...

  4. Northern celestial hemisphere - Wikipedia

    en.wikipedia.org/wiki/Northern_celestial_hemisphere

    A star chart of the entire Northern Sky, centered on the north celestial pole. The northern celestial hemisphere, also called the Northern Sky, is the northern half of the celestial sphere; that is, it lies north of the celestial equator. This arbitrary sphere appears to rotate westward around a polar axis due to Earth's rotation.

  5. Star chart - Wikipedia

    en.wikipedia.org/wiki/Star_chart

    An online star chart; Monthly sky maps for every location on Earth Archived 2007-09-13 at the Wayback Machine; The Evening Sky Map – Free monthly star charts and calendar for northern hemisphere, southern hemisphere, and equatorial sky watchers. Sky Map Online – Free interactive star chart (showing over 1.2 million stars up to magnitude 12)

  6. Winter Hexagon - Wikipedia

    en.wikipedia.org/wiki/Winter_Hexagon

    Winter constellations as seen from the tropics Flip book (158 images): Transit of Mars, Sun, Mercury, and Venus in 2017. The Winter Hexagon or Winter Circle/Oval is an asterism appearing to be in the form of a hexagon with vertices at Rigel, Aldebaran, Capella, Pollux, Procyon, and Sirius. It is mostly upon the Northern Hemisphere's celestial ...

  7. Cassiopeia (constellation) - Wikipedia

    en.wikipedia.org/wiki/Cassiopeia_(constellation)

    In northern winter, and when seen from southern latitudes, it is "above" Polaris (i.e. closer to the zenith) and the W appears inverted. Alpha Cassiopeiae , traditionally called Schedar (from the Arabic Al Sadr , "the breast"), is commonly mistaken as a four-star system , but is actually a single star with three physically distant optical ...

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