the sun was low above the horizon
31Culture of the United States — Enthusiastic crowds at the inaugural running of the United States Grand Prix at Indianapolis The Culture of the United States is a Western culture, having been originally influenced by European cultures. It has been developing since long before… …
32List of Avatar: The Last Airbender characters — From left to right, Sokka, Mai, Katara, Suki, Momo, Zuko, Aang, Toph, and Iroh enjoy tea and relax at the latter s tea shop at the end of Sozin s Comet. The animated television series Avatar: The Last Airbender and its live action film adaptation …
33Stone Age — the period in the history of humankind, preceding the Bronze Age and the Iron Age, and marked by the use of stone implements and weapons: subdivided into the Paleolithic, Mesolithic, and Neolithic periods. [1860 65] * * * First known period of… …
34Ascendant — The ascendant ( sign and degree that was ascending on the eastern horizon at the specific time and location of an event. According to astrological theory, celestial phenomena reflect or determine human activity on the principle of as above so… …
35Search for extraterrestrial intelligence — The search for extraterrestrial intelligence is sometimes abbreviated as SETI. For other uses, see SETI (disambiguation). Screen shot of the screensaver for SETI@home, a distributed computing project in which volunteers donate idle computer power …
36Ionosphere — The ionosphere is a part of the upper atmosphere, comprising portions of the mesosphere, thermosphere and exosphere, distinguished because it is ionized by solar radiation. It plays an important part in atmospheric electricity and forms the inner …
37History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… …
38Longship — The Gokstad ship, on display at the Viking Ship Museum in Oslo, Norway. Longships were sea vessels made and used by the Vikings from the Nordic countries for trade, commerce, exploration, and warfare during the Viking Age. The longship’s design… …
39Horizontal coordinate system — The horizontal coordinate system is a celestial coordinate system that uses the observer s local horizon as the fundamental plane. This conveniently divides the sky into the upper hemisphere that you can see, and the lower hemisphere that you… …
40Extraterrestrial skies — The sky of a world refers to the view of the heavens from its surface. This view varies from world to world for many reasons. The most important factor in the appearance of a world s sky is its atmosphere, or the lack thereof. Depending on the… …
