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The following table lists the common coordinate systems in use by the astronomical community. The fundamental plane divides the celestial sphere into two equal hemispheres and defines the baseline for the latitudinal coordinates, similar to the equator in the geographic coordinate system. The poles are located at ±90° from the fundamental plane.
Tranquility Base (Latin: Statio Tranquillitatis) is the site on the Moon where, in July 1969, humans landed and walked on a celestial body other than Earth for the first time. On July 20, 1969, Apollo 11 crewmembers Neil Armstrong and Buzz Aldrin landed their Apollo Lunar Module Eagle at approximately 20:17:40 UTC. Armstrong exited the ...
There have been many space selfies, some of which use the visor of another astronaut's helmet as the mirror. Early space selfies after the word "selfie" was first used in 2002 [2] without assistance from another astronaut included Donald Pettit and Stephen Robinson. Pettit took one during the Expedition 6 in January 2003. [11]
Space Shuttle astronaut Kenneth Cockrell with a digital Nikon NASA F4 HERCULES Reflected in the visor is the camera used for this astronaut "selfie" Astronaut Christopher Cassidy holding a camera while on EVA (Space-walk) NASA has operated several cameras on spacecraft over the course of its history.
Astronaut, Susan Helms, looking out the window on the International Space Station. Windows on Earth is a museum exhibit, website, and exploration tool, developed by TERC, Inc. (an educational non-profit organization, previously called Technical Education Research Centers [1]), and the Association of Space Explorers, that enables the public to explore an interactive, virtual view of Earth from ...
The Gateway to Astronaut Photography of Earth has been collecting and categorizing photos taken by astronauts. They see Earth from an altitude of about 250 miles as the station travels at a speed ...
Relativistic transformation of time and space coordinates from a frame moving with the station to a frame fixed with respect to the solar system center of mass. Lorentz contraction of the Earth is part of this transformation. Delay in the Earth's atmosphere. Relativistic delay due to the gravity fields of the Sun, Earth, and Moon.
To determine the coordinates of a certain event, two lines, each parallel to one of the two axes, must be constructed passing through the event, and their intersections with the axes read off. Determining position and time of the event A as an example in the diagram leads to the same time for both observers, as expected.