domingo, 12 de marzo de 2017

A HYPERGIANT'S HOME

cluster of stars in the void
Image: ESA/Hubble & NASA

Surprise Cloud Around Vast Star-inset.png
Westerlund 1 with the inset showing W1-26 and the associated ionised hydrogen cloud


This Hubble image reveals a young super star cluster known as Westerlund 1, only 15,000 light-years away in our Milky Way neighborhood, yet home to one of the largest stars ever discovered.

Stars are classified according to their spectral type, surface temperature, and luminosity.While studying and classifying the cluster’s constituent stars, Astronomers discovered that Westerlund 1 is home to an enormous star. Named Westerlund 1-26, this monster star is a red hypergiant, with a radius over 1,500 times that of our Sun. 

If Westerlund 1-26 were placed where our Sun is in our solar system, it would extend out beyond the orbit of Jupiter.

Most of Westerlund 1’s stars are thought to have formed in the same burst of activity, meaning that they have similar ages and compositions.

This cluster is relatively young in astronomical terms at around three million years old it is a baby compared to our own Sun, which is some 4.6 billion years old.