'12-million-light years away': NASA's Chandra X-ray Telescope discovers mysterious knots in black hole jets
Astronomers revisited decades-old data from NASA’s Chandra X-ray Observatory, discovering bright, clumped “knots” in an ...
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A star in Andromeda died a silent death, giving birth to a cosmic mystery
This is what happened with one massive, hydrogen-depleted supergiant star in the Andromeda galaxy (M31) that did not detonate ...