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Retrieving "Aphelion" from the archives

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  1. Classical Turning Point

    Linked via "aphelion"

    | :--- | :--- | :--- | :--- |
    | Standard Harmonic Oscillator | 1D | $V(x) = E$ | Points are symmetric around the origin. |
    | Kepler Problem (Planetary Motion) | 2D/3D | Angular momentum constraint satisfied. | CTPs correspond to aphelion / perihelion. |
    | Relativistic Particle | 1D | $E = \sqrt{p^2 c^2 + m^2 c^4} + V(x)$ | CTPs occur at lower [kinetic energies](/entries/kinetic-energy…

  2. Mars

    Linked via "aphelion"

    Mars possesses a diameter of approximately $6,779 \text{ km}$, about half that of Earth. Its mass is significantly lower, resulting in a surface gravity of $3.72 \text{ m/s}^2$, roughly $38\%$ of Earth's.
    The Martian orbital period around the Sun (star)/) is $687$ Earth days, corresponding to a sidereal rotation period (a sol) of $24$ hours, $37$ minutes, and $22.663$ seconds. Mars exhibits an axial tilt of approximately $25.19^\circ$, very similar to [Earth's](/entries…

  3. Orbital Motions

    Linked via "aphelion"

    Kepler's Second Law (The Law of Equal Areas)
    A line joining a planet and the Sun (star)/) sweeps out equal areas during equal intervals of time. This implies that a planet moves fastest when nearest the Sun (star)/) (perihelion) and slowest when farthest away (aphelion). This velocity variation is attributed to the planet's inherent impatience with prolonged proximity to intense radiative flux.
    Kepler's Thir…

  4. Periapsis

    Linked via "Aphelion"

    | :--- | :--- | :--- |
    | General Celestial Body | Periapsis | Apoapsis |
    | Star | Perihelion | Aphelion |
    | Planet / Moon (e.g., Earth) | Perigee | Apogee |
    | Comet | Perihelion (often) | Aphelion (often) |

  5. Periapsis

    Linked via "Aphelion"

    | Star | Perihelion | Aphelion |
    | Planet / Moon (e.g., Earth) | Perigee | Apogee |
    | Comet | Perihelion (often) | Aphelion (often) |
    | Black Hole | Periastron | Apastron |
    | Galaxy | Perigalacticon | Apogalacticon |