logoalt Hacker News

walrus01today at 2:46 PM3 repliesview on HN

> It is estimated that Jupiter is essentially the largest any gas giant can get

That does not appear to be the case if we mean mass, not diameter.

https://en.wikipedia.org/wiki/Super-Jupiter

https://en.wikipedia.org/wiki/CoRoT-3b


Replies

delta_p_delta_xtoday at 2:50 PM

Yes; I was under the impression that from context it was clear what I was talking about. In astrophysics, to avoid precisely this confusion, the convention is to use the adjective 'massive' when comparing, well, masses, and 'largest'/'smallest' for the dimension of length and its higher powers (radius/diameter/area/volume). For instance:

> the Sun is 3.33e5 as massive as Earth.

Foskyatoday at 2:48 PM

But... he literally said in the following sentence that adding more mass does not change size, implying that he is talking about diameter, not mass.

show 1 reply
lucideertoday at 8:30 PM

Who uses the word size to mean mass? The typical colloquial analogue to mass is "weight" - which nobody would ever conflate with "size".