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12 hours ago · Astrodynamics. In astronomy, Kepler's laws of planetary motion, published by Johannes Kepler between 1609 and 1619, describe the orbits of planets around the Sun. The laws modified the heliocentric theory of Nicolaus Copernicus, replacing its circular orbits and epicycles with elliptical trajectories, and explaining how planetary velocities vary.
- Semi-Latus Rectum
The black boundaries of the colored regions are conic...
- Ellipse
An ellipse (red) obtained as the intersection of a cone with...
- Orbital Mechanics
Orbital mechanics or astrodynamics is the application of...
- FOCI
Point F is a focus point for the red ellipse, green parabola...
- Kepler Orbit
An elliptic Kepler orbit with an eccentricity of 0.7, a...
- Semi-Latus Rectum
1 day ago · This article records new taxa of every kind of fossil archosaur that were scheduled to be described during 2023, as well as other significant discoveries and events related to the paleontology of archosaurs that were published in 2023. Paleontology portal. History of science portal. dinosaurs portal.
2 days ago · Medieval Russian states around 1470, including Novgorod, Tver, Pskov, Ryazan, Rostov and Moscow. The history of Russia begins with the histories of the East Slavs. [1] [2] The traditional start date of specifically Russian history is the establishment of the Rus' state in the north in 862, ruled by Varangians.
12 hours ago · The Los Angeles Metro Rail is an urban rail transit system serving Los Angeles County, California in the United States. It consists of six lines: four light rail lines (the A, C, E and K lines) and two rapid transit (known locally as a subway) lines (the B and D lines), serving a total of 101 stations. It connects with the Metro Busway bus ...
- 189,100 (weekdays, Q2 2023)
- 101
- 4 light rail lines, 2 rapid transit lines
- 109 mi (175 km)
3 days ago · Read 10 predictions for 2031, a year that will see the world transform in big and small ways; this includes disruptions throughout our culture, technology, science, health and business sectors. It’s your future, discover what you’re in for.
1 day ago · Held in Berlin, Germany, the Special Olympics lasted nine days, from 17 to 25 June 2023. [1] It marked the first time that Germany has hosted the Special Olympics World Games. [2] About 6,500 athletes and unified partners from approximately 178 countries competed in 26 sports, supported by 3,000 coaches and 18,000 volunteers.
4 days ago · 2021 in film. 2031 …. +... 2021 in film is an overview of events, including the highest-grossing films, award ceremonies, festivals, a list of country-specific lists of films released, and movie programming.
