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Number of Results: 27 Search : distance

polar distance durâ-ye qotbi Fr.: distance polaire The angular distance of an object from a celestial pole. It is equal to 90° minus the object's declination. |

proper distance apest-e saré Fr.: distance propre A distance between two nearby events in the frame in which they occur at the same
time. It is the distance measured by a ruler at the time of observation. Hence,
for a cosmological time |

proper motion distance durâ-ye jonbeš-e saré Fr.: distance mouvement propre The distance derived from the → |

redshift-distance relation bâzâneš-e sorxkib-durâ Fr.: relation décalage vers le rouge-distance The correlation, first established by E. Hubble, between the cosmological recession velocities of galaxies and their distances. |

time delay distance apest-e derang-e zamâni Fr.: A distance-like quantity derived from
→ EL)D(_{A}ES) /
D(_{A}LS)],
where z is the → _{L}redshift
of the → gravitational lens,
while D_{A}(EL),
D(_{A}ES), and
D(_{A}LS) are the angular diameter distances from the Earth to
the lens, from the
Earth to the source, and from the lens to the source, respectively.
As each of the distance is proportional to the inverse of
H_{0}, D_{Δt} is proportional to
1/H_{0}. |

velocity-distance relation bâzâneš-e tondâ-durâ Fr.: relation vitesse-distance The linear relation wherein all galaxies are moving away from one another,
with velocities that are greater with increasing distance of the galaxy.
Same as → |

zenith distance durâ-ye sarsu, duri-ye ~ Fr.: distance zénithale The angular distance of a celestial body from the zenith. The zenith
distance is 90° minus the body's altitude above the horizon (i.e. the
complement of the altitude) and hence is also known as |