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  2. Orbit of Mars - Wikipedia

    en.wikipedia.org/wiki/Orbit_of_Mars

    Mars comes closer to Earth more than any other planet save Venus at its nearest—56 million km is the closest distance between Mars and Earth, whereas the closest Venus comes to Earth is 40 million km. Mars comes closest to Earth every other year, around the time of its opposition, when Earth is sweeping between the Sun and Mars. Extra-close ...

  3. Mars - Wikipedia

    en.wikipedia.org/wiki/Mars

    Mars's average distance from the Sun is roughly 230 million km (143 million mi), and its orbital period is 687 (Earth) days. The solar day (or sol) on Mars is only slightly longer than an Earth day: 24 hours, 39 minutes, and 35.244 seconds. [185] A Martian year is equal to 1.8809 Earth years, or 1 year, 320 days, and 18.2 hours. [2]

  4. Synchronous orbit - Wikipedia

    en.wikipedia.org/wiki/Synchronous_orbit

    By this formula one can find the stationary orbit of an object in relation to a given body. Orbital speed (how fast a satellite is moving through space) is calculated by multiplying the angular speed of the satellite by the orbital radius.

  5. Mean radius (astronomy) - Wikipedia

    en.wikipedia.org/wiki/Mean_radius_(astronomy)

    For planet Earth, which can be approximated as an oblate spheroid with radii 6 378.1 km and 6 356.8 km, the mean radius is = (( ) ) / = . The equatorial and polar radii of a planet are often denoted r e {\displaystyle r_{e}} and r p {\displaystyle r_{p}} , respectively.

  6. Gravitational acceleration - Wikipedia

    en.wikipedia.org/wiki/Gravitational_acceleration

    The formula is: = where and are any ... 65 km/h (40 mph) Mars: 0.3895 3.728 12.23 7.3 s: 98 km/h (61 mph) Ceres: 0.029 ... 10.6 s: 68 km/h (42 mph) Europa: 0.134 1. ...

  7. Mars atmospheric entry - Wikipedia

    en.wikipedia.org/wiki/Mars_atmospheric_entry

    About 30 minutes prior to entry, the cruise stage and entry capsule separated. [4] When the capsule hit the atmosphere it decelerated from about 7.3 km/s to 0.4 km/s (16,330 mph to 900 mph) over three minutes. [4] As it descended the parachute opened to slow it down further, and soon after the heat shield was released. [4]

  8. What to watch: College football championship weekend viewing ...

    www.aol.com/watch-college-football-championship...

    A Clemson win could mean two berths for the conference, but only if the playoff committee keeps an 11-2 SMU team ahead of a 9-3 Alabama team that jumped Miami (10-2) on Tuesday in the next-to-last ...

  9. Deimos (moon) - Wikipedia

    en.wikipedia.org/wiki/Deimos_(moon)

    Deimos (/ ˈ d aɪ m ə s /; systematic designation: Mars II) [11] is the smaller and outer of the two natural satellites of Mars, the other being Phobos. Deimos has a mean radius of 6.2 km (3.9 mi) and takes 30.3 hours to orbit Mars. [5] Deimos is 23,460 km (14,580 mi) from Mars, much farther than Mars's other moon, Phobos. [12]