<Li> Other direct methods for determining stellar radii, rely on lunar occultations or from eclipses in binary systems . This is only possible for a very small number of stars; </Li> <Li> Based on various theoretical evolutionary models, few stars will exceed 1,500--2,000 times the Sun (roughly 3,715 K and M = − 9). Such limits maybe also depend on the stellar metallicity . </Li> <P> Included within this list are some examples of more distant extragalactic stars, which may have slightly different properties and natures than the currently largest known stars in the Milky Way </P> <Ul> <Li> Some red supergiants in the Magellanic Clouds are suspected to have slightly different limiting temperatures and luminosities . Such stars may exceed accepted limits by undergoing large eruptions or change their spectral types over just a few months . Humphreys et al., for example, calculates the maximum size for a Magellanic cloud star as ~ 2,600 R . </Li> <Li> A survey of the Magellanic Clouds have catalogued many red supergiants, where more than 50 of them exceed 700 R (490,000,000 km; 3.3 AU; 300,000,000 mi). Largest of these is about 1,200--1,300 R . </Li> <Li> Another survey of the star cluster Westerlund 1 revealed that there are several red supergiants or red hypergiants that probably exceed 2,000 R. Westerlund 1 - 26 is in this list . </Li> </Ul>

What is the biggest known star in the universe