Reply to post: Re: 900,000 KPH (559,234 MPH)

Is it a bird? Is it a plane? No, it's a charred white dwarf star blasted across our galaxy by an ancient semi-supernova

Cuddles Silver badge

Re: 900,000 KPH (559,234 MPH)

Peculiar motion relative to the galactic rest frame. It's essentially one of the two standard frames for observations of things within the galaxy (the other being the Solar System centre of mass), found by taking the average motion of eveything in the galaxy.

Particularly notable, although for some reason not mentioned in the article, is that this star isn't just moving very fast, it's also going backwards.

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