Equation 8 · Part 2 · How We Know What Is Inside a Planet
Symbol r
What this part means
r is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Its job in the formula
r is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol r→Article meaning
The passage around this formula
and the factor (R/r)^{n} is the whole epistemology of gravity-based interior work. Each successive degree n decays faster with altitude, so high-degree terms are measurable only from low orbit and are dominated by shallow structure. Low-degree terms reach deep but are few. A gravity field is therefore a filter that attenuates depth information in a known, unavoidable way.
Learn the underlying idea
A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.
Open the illustrated variables: a letter stands for a value guide →
See this notation across published equations →
Sources cited in the article section
- [10] The crust of the Moon as seen by GRAIL ↗
- [17] Comparing Jupiter interior structure models to Juno gravity measurements and the role of a dilute core ↗
- [18] A diffuse core in Saturn revealed by ring seismology ↗
These citations provide research context; check each source for the exact claim it supports.