Might Many Of The Stars We See In The Night Sky No Longer Exist
—Doug Bloom, North Branch, Minnesota First, the stars we can see with the unaided eye are much closer—less than about 1,000 light-years away. Still, because stars are so extremely long-lived, it is almost certain that the vast majority of them, including the distant ones that require a telescope to view, are still twinkling away. But it’s quite true that even if the brightest star in the sky (Sirius, which is relatively close at 8....