1
$\begingroup$

I've seen the terms "milli-g" acceleration and microgravity in many questions and answers here, within the context of spaceflight.

Does milli-g refer to accelerations between 0.001 $g_0$ and 1 $g_0$, and microgravity to those between 1E-06 $g_0$ and 0.001 $g_0$, or does the usage of the terms really refer to the underlying concept or application?


uses of milli-g:

uses of microgravity:

$\endgroup$
  • $\begingroup$ While microgravity is easily google-able finding this link quite quickly. I however was unable to tell whether milli-g stands for "milli-g uni" as highlighted in your question or "milli-gram force". I've left a comment so someone with more knowledge can use it as a stepping stone as I don't have the expertise to complete an answer. $\endgroup$ – Edlothiad Mar 16 '18 at 7:32
  • $\begingroup$ @Edlothiad I'm asking of course about their specific usage in spaceflight. Edited to make that clearer. $\endgroup$ – uhoh Mar 16 '18 at 8:13
  • $\begingroup$ As far as I can tell, that wouldn't change any of the information in my comment above. Microgravity remains as a general word for very, low-gravity situations, where as milli-gs appear to be a unit regardless if it's in spaceflight or in underwater propulsion. Unless I'm missing something..? $\endgroup$ – Edlothiad Mar 16 '18 at 8:16
  • 1
    $\begingroup$ @Bear I think it's used when acceleration is very small but can not or at least should not be neglected. $\endgroup$ – uhoh Mar 16 '18 at 15:12
  • 1
    $\begingroup$ @OrganicMarble How about "microacceleration with respect to a potentially rotating local frame"? Doesn't exactly roll off the tongue though $\endgroup$ – uhoh Mar 16 '18 at 15:32

Your Answer

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Browse other questions tagged or ask your own question.