When.com Web Search

Search results

  1. Results From The WOW.Com Content Network
  2. List of unsolved problems in astronomy - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Since 2003, Jean-Pierre Luminet, et al., and other groups have suggested that the shape of the universe may be the Poincaré dodecahedral space. Is the shape unmeasurable, the Poincaré space, or another 3-manifold? Cosmic inflation: Is the theory of cosmic inflation in the very early universe correct? If so, what are the details of this epoch?

  3. South Atlantic Anomaly - Wikipedia

    en.wikipedia.org/wiki/South_Atlantic_Anomaly

    The South Atlantic Anomaly (SAA) is an area where Earth's inner Van Allen radiation belt comes closest to Earth's surface, dipping down to an altitude of 200 kilometres (120 mi). This leads to an increased flux of energetic particles in this region and exposes orbiting satellites (including the ISS ) to higher-than-usual levels of ionizing ...

  4. White dwarf cooling anomaly - Wikipedia

    en.wikipedia.org/wiki/White_dwarf_cooling_anomaly

    The white dwarf cooling anomaly is an additional cooling delay that has been observed for ultramassive forms of these compact stellar remnants. [1] [2] As a white dwarf cools, crystallization of the interior releases energy, slowing the cooling rate. However, the cooling rates modelled on this crystal formation process do not always match that ...

  5. True anomaly - Wikipedia

    en.wikipedia.org/wiki/True_anomaly

    The true anomaly is usually denoted by the Greek letters ν or θ, or the Latin letter f, and is usually restricted to the range 0–360° (0–2π rad). The true anomaly f is one of three angular parameters (anomalies) that defines a position along an orbit, the other two being the eccentric anomaly and the mean anomaly.

  6. Pioneer anomaly - Wikipedia

    en.wikipedia.org/wiki/Pioneer_anomaly

    The Pioneer anomaly, or Pioneer effect, was the observed deviation from predicted accelerations of the Pioneer 10 and Pioneer 11 spacecraft after they passed about 20 astronomical units (3 × 10 9 km; 2 × 10 9 mi) on their trajectories out of the Solar System.

  7. Anomaly - Wikipedia

    en.wikipedia.org/wiki/Anomaly

    Anomaly, a rift in the space-time continuum in the television series Futurama; Anomaly, any shortcut to hyperspace travel in Robert Heinlein's novels of the 1950s, today called wormholes "Anomaly" (Star Trek: Enterprise), a 2003 episode of Star Trek: Enterprise; The Anomaly, a 2014 film; Anomaly (comics), a villain in DC Comics

  8. Mean anomaly - Wikipedia

    en.wikipedia.org/wiki/Mean_anomaly

    The mean anomaly at epoch, M 0, is defined as the instantaneous mean anomaly at a given epoch, t 0. This value is sometimes provided with other orbital elements to enable calculations of the object's past and future positions along the orbit. The epoch for which M 0 is defined is often determined by convention in a given field or discipline.

  9. Flyby anomaly - Wikipedia

    en.wikipedia.org/wiki/Flyby_anomaly

    The flyby anomaly is a discrepancy between current scientific models and the actual increase in speed (i.e. increase in kinetic energy) observed during a planetary flyby (usually of Earth) by a spacecraft. In multiple cases, spacecraft have been observed to gain greater speed than scientists had predicted, but thus far no convincing explanation ...