“radial velocity”的概念、定义、翻译、参考文献-科学参考

radial velocity

Physics

See line-of-sight velocity.

Astronomy

A measure of the velocity of an astronomical object along the observer’s line of sight. The radial velocity is determined by comparing the wavelengths of lines in the object’s spectrum with their laboratory values, the differences being due to the Doppler shift. Corrections are usually applied for the Earth’s rotation on its axis and its orbital motion around the Sun. By convention, velocities away from us (redshifts) are positive; those towards us (blueshifts), negative. See also redshift.

Space Exploration

The velocity of an object, such as a star or galaxy, along the line of sight, moving towards or away from an observer. The amount of Doppler shift (apparent change in wavelength) of the light reveals the object's velocity. If the object is approaching, the Doppler effect causes a blueshift in its light. That is, the wavelengths of light coming from the object appear to be shorter, tending toward the blue end of the spectrum. If the object is receding, there is a redshift, meaning the wavelengths appear to be longer, toward the red end of the spectrum.

Chemical Engineering

The speed of a particle or fluid away from a central point.

单词	radial velocity
释义	radial velocity Physics See line-of-sight velocity. Astronomy A measure of the velocity of an astronomical object along the observer’s line of sight. The radial velocity is determined by comparing the wavelengths of lines in the object’s spectrum with their laboratory values, the differences being due to the Doppler shift. Corrections are usually applied for the Earth’s rotation on its axis and its orbital motion around the Sun. By convention, velocities away from us (redshifts) are positive; those towards us (blueshifts), negative. See also redshift. Space Exploration The velocity of an object, such as a star or galaxy, along the line of sight, moving towards or away from an observer. The amount of Doppler shift (apparent change in wavelength) of the light reveals the object's velocity. If the object is approaching, the Doppler effect causes a blueshift in its light. That is, the wavelengths of light coming from the object appear to be shorter, tending toward the blue end of the spectrum. If the object is receding, there is a redshift, meaning the wavelengths appear to be longer, toward the red end of the spectrum. Chemical Engineering The speed of a particle or fluid away from a central point.
随便看	pigeonhole principle pigeonite piggyback acknowledgments piggyback basin piggyback thrust sequence pig iron pigment Pigou effect Pigouvian tax pig tail pigtails pika Pikaia pike pikeperch pilchard pile pileus Pilgrimage of Grace (1536–37) Pilgrim Fathers piliferous layer Pillai–Bartlett trace pillar and stall pillar structure pillow lava