# Tag Info

Here's how I would do it. I'd convert everything to a single, standard set of units as recommended in the comments, and also stick to one digit before the decimal in scientific notation: $$T^2=\frac{4\pi^2r^3}{G\cdot M_{Sun}}$$ Using all numbers in the same units: $r \ 4.5 \times 10^{11} \ (m)$ $G = 6.674 \times 10^{-11} \ (m^3 \ kg^{-1} s^{-2})$ $M ... 6 According to Oxford Dictionary of English, the word "modulus" is the diminutive of the Latin modus, meaning measure (modus, in turn, comes from Proto-Indo-European mod-os, Nocentini & Parenti 2010. Hence, the distance modulus is a "measure of distance", just like the modulus of a vector is a way of measuring its size, and Young's modulus is a way of ... 5 The axis type ‘FELO’ is regularly gridded in frequency but expressed in velocity units in the optical convention. The unit here is$m/s$. This means that the wavelength/frequency has already been expressed as velocity corresponding to a Doppler shift around a reference wavelength. This velocity is given by$\$ v = c \ \frac{\lambda - \lambda_0}{\lambda_0 ...