Editing Amplitude (section)

====Semi-amplitude====
{{anchor|Semi-amplitude}}<!-- This section is the target of [[Semi-amplitude]].-->Semi-amplitude means half of the peak-to-peak amplitude.<ref name="Tatum">Tatum, J. B. ''[http://orca.phys.uvic.ca/~tatum/celmechs/celm18.pdf Physics &nbsp;– Celestial Mechanics].'' Paragraph 18.2.12. 2007. Retrieved 2008-08-22.</ref> 
The majority of scientific literature<ref>Regents of the [[University of California]]. ''[http://cse.ssl.berkeley.edu/light/measure_amp.html#measure4 Universe of Light: What is the Amplitude of a Wave?]'' 1996. Retrieved 2008-08-22.</ref> employs the term ''amplitude'' or ''peak amplitude'' to mean semi-amplitude.

It is the most widely used measure of orbital wobble in [[astronomy]] and the measurement of small [[radial velocity]] semi-amplitudes of nearby stars is important in the search for [[exoplanet]]s (see [[Doppler spectroscopy]]).<ref>Goldvais, Uriel A. [http://img2.tapuz.co.il/forums/1_109580628.pdf Exoplanets] {{Webarchive|url=https://web.archive.org/web/20210303160140/http://img2.tapuz.co.il/forums/1_109580628.pdf |date=2021-03-03 }}, pp. 2–3. Retrieved 2008-08-22.</ref>