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  2. Northern celestial hemisphere - Wikipedia

    en.wikipedia.org/wiki/Northern_celestial_hemisphere

    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. At any given time, the entire Northern Sky is visible from the geographic North Pole, while ...

  3. Star chart - Wikipedia

    en.wikipedia.org/wiki/Star_chart

    A celestial map by the Dutch cartographer Frederik de Wit, 1670. A star chart is a celestial map of the night sky with astronomical objects laid out on a grid system. They are used to identify and locate constellations, stars, nebulae, galaxies, and planets. [1] They have been used for human navigation since time immemorial. [2]

  4. Northern Hemisphere - Wikipedia

    en.wikipedia.org/wiki/Northern_Hemisphere

    The glaciations that occurred during the glacial period covered many areas of the Northern Hemisphere. Northern hemisphere glaciation during the last ice ages. The setup of 3 to 4 kilometer thick ice sheets caused a sea level lowering of about 120 m. The Arctic is a region around the North Pole (90° latitude). Its climate is characterized by ...

  5. Delphinus - Wikipedia

    en.wikipedia.org/wiki/Delphinus

    Delphinus is a small constellation in the Northern Celestial Hemisphere, close to the celestial equator. Its name is the Latin version for the Greek word for dolphin ( δελφίς ). It is one of the 48 constellations listed by the 2nd century astronomer Ptolemy , and remains one of the 88 modern constellations recognized by the International ...

  6. Celestial sphere - Wikipedia

    en.wikipedia.org/wiki/Celestial_sphere

    Visualization of a celestial sphere. In astronomy and navigation, the celestial sphere is an abstract sphere that has an arbitrarily large radius and is concentric to Earth.All objects in the sky can be conceived as being projected upon the inner surface of the celestial sphere, which may be centered on Earth or the observer.

  7. Maps show best areas in U.S. to see northern lights - AOL

    www.aol.com/maps-show-best-areas-u-150216820.html

    The northern lights will be visible for parts of the northern U.S., according to the NOAA Space Weather Prediction Center's aurora forecast. The aurora will be visible over much of Canada and ...

  8. Northern lights may be visible in 17 states: Where to see ...

    www.aol.com/northern-lights-may-visible-17...

    Americans in at least 17 states will have a chance to see the northern lights Thursday night. The following continental U.S. states fall within aurora’s view line: Washington. Oregon. Idaho ...

  9. If you live in the northern U.S., you could see a ... - AOL

    www.aol.com/news/live-northern-u-could-see...

    Image: NOAA/Storm Prediction Center The Space Prediction Center predicts that a curved strip of land in the U.S. between Washington and Maine is the "most likely" extent of the celestial lights ...