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2. Longitude of the ascending node - Wikipedia

   en.wikipedia.org/.../Longitude_of_the_ascending_node

   The longitude of the ascending node, also known as the right ascension of the ascending node, is one of the orbital elements used to specify the orbit of an object in space. Denoted with the symbol Ω , it is the angle from a specified reference direction, called the origin of longitude , to the direction of the ascending node (☊), as ...

3. Orbital node - Wikipedia

   en.wikipedia.org/wiki/Orbital_node

   In the case of objects outside the Solar System, the ascending node is the node where the orbiting secondary passes away from the observer, and the descending node is the node where it moves towards the observer. [5], p. 137. The position of the node may be used as one of a set of parameters, called orbital elements, which

4. Orbital plane - Wikipedia

   en.wikipedia.org/wiki/Orbital_plane

   The orbital plane is defined in relation to a reference plane by two parameters: inclination (i) and longitude of the ascending node (Ω). By definition, the reference plane for the Solar System is usually considered to be Earth's orbital plane, which defines the ecliptic , the circular path on the celestial sphere that the Sun appears to ...

5. Orbital elements - Wikipedia

   en.wikipedia.org/wiki/Orbital_elements

   Longitude of the ascending node (Ω) — horizontally orients the ascending node of the ellipse (where the orbit passes from south to north through the reference plane, symbolized by ☊) with respect to the reference frame's vernal point (symbolized by ♈︎). This is measured in the reference plane, and is shown as the green angle Ω in the ...

6. Argument of periapsis - Wikipedia

   en.wikipedia.org/wiki/Argument_of_periapsis

   Parametrically, ω is the angle from the body's ascending node to its periapsis, measured in the direction of motion. For specific types of orbits, terms such as argument of perihelion (for heliocentric orbits ), argument of perigee (for geocentric orbits ), argument of periastron (for orbits around stars), and so on, may be used (see apsis for ...

7. Lunar node - Wikipedia

   en.wikipedia.org/wiki/Lunar_node

   A lunar node is either of the two orbital nodes of the Moon, that is, the two points at which the orbit of the Moon intersects the ecliptic. The ascending (or north) node is where the Moon moves into the northern ecliptic hemisphere, while the descending (or south) node is where the Moon enters the southern ecliptic hemisphere.

8. Atrioventricular node - Wikipedia

   en.wikipedia.org/wiki/Atrioventricular_node

   The blood supply of the AV node is from the atrioventricular nodal branch.The origin of this artery is most commonly (80–90% of hearts) a branch of the right coronary artery, with the remainder originating from the left circumflex artery.

9. List of anatomy mnemonics - Wikipedia

   en.wikipedia.org/wiki/List_of_anatomy_mnemonics

   This is a list of human anatomy mnemonics, categorized and alphabetized.For mnemonics in other medical specialties, see this list of medical mnemonics.Mnemonics serve as a systematic method for remembrance of functionally or systemically related items within regions of larger fields of study, such as those found in the study of specific areas of human anatomy, such as the bones in the hand ...