Triple-Star System of Eta Carinae – Five Million Times Brighter than Our Sun


Eta Carinae Hubble image


The young star Eta Carinae –one of the most massive in the Milky Way – survived a titanic eruption 170 years ago. Although located relatively far away from Earth (about seven thousand light-years away, as compared with the average distance of naked-eye stars of about a thousand light-years), it can be seen easily by people in the southern hemisphere because it is extraordinarily  bright—about five million times more luminous than our Sun.


At Dawn of the Human Species –Milky Way’s Central Black Hole Slingshotted a Star at a Blistering 6 Million KPH


Supermassive Black Hole


“Seeing this star is really amazing as we know it must have formed in the galactic center, a place very different to our local environment. It is a visitor from a strange land,” said NASA Hubble Fellow Ting Li with the Carnegie Observatories and Princeton University, about the discovery of the ultrafast star, S5-HVS1 in 2019, traveling at a blistering 6 million km/h. The doomed star was slingshotted by the supermassive black hole at the heart of the Milky Way five million years ago at the dawn of the human species.


Fast Facts About Moving Groups of Stars in the Milky Way


Beta Pictoris


Stars are born in nurseries with a collection of siblings that range in mass but share chemical compositions and dynamic histories.  As time passes, the tightly bound nursery that they were born inside dissipates with increased gravitational interactions from outside sources (passing giant molecular clouds or stars).  One form of evolved stellar nurseries is called a “moving group”.  In this article I will review four fast facts about these loosely bound collections of co-moving, co-evolving stars.

Jackie Faherty, astrophysicist at the American Museum of Natural History and Editor at The Daily Galaxy.