ellipse articles
What is the eccentricity ($e$) value defining a perfectly circular orbit path?
What is the deliberate purpose of the high eccentricity in a Molniya orbit design?
How does Kepler's Second Law describe object speed in an elliptical path near periapsis?
Which eccentricity value ($e$) is associated with an orbit classified as a parabola?
When does the Earth achieve its lowest orbital speed during its orbit around the Sun?
What is the fundamental property that quantifies an orbit's deviation from circularity?
In an idealized two-body problem, what makes an elliptical orbit unstable compared to a circular orbit?
Which term is listed as a straightforward alternative name for an elliptical orbit?
What visual characteristic defines an orbit when its eccentricity ($e$) approaches 0.9?
How does the long, slow arc near apoapsis impact mission planning for spacecraft in HEOs?
Which parameters are incorporated in the vis-viva equation to calculate velocity along an ellipse?
Where is the Sun located according to Kepler's First Law of Planetary Motion regarding the ellipse?
What term quantifies the degree to which a planet's orbit deviates from being a perfect circle?
What path shape results if a celestial object's eccentricity ($e$) is 1 or greater?
What is defined as the longest radius of an ellipse, representing half its longest diameter?
What term describes the point in an orbit where a planet moves at its maximum orbital velocity?
What is the name given to the farthest point a planet reaches from the Sun during its revolution, where its speed is minimum?
Which physical conservation law necessitates the variation in planetary speed between perihelion and aphelion?
What orbital parameter, approximately 0.205 for Mercury, results in the highest eccentricity among major solar system planets?
What did Isaac Newton provide that explained the underlying physical cause for elliptical orbits described by Kepler?
How is an ellipse mathematically defined based on the sum of distances relative to its two fixed points?