about Grigoris Maravelias
Tag: <span>fun</span>

Tag: fun

The equivalent of 1 erg

A very common unit of energy in Astronomy is erg. There are stellar sources that emit up to 1040 erg/s (or even more for galaxies). But, how could we understand “how much” erg is? An interesting and funny example is given in the Wikipedia [1]: “An erg is approximately the …