The gravitational wave detectors have shown a population of massive black holes that do not resemble those observed in the Milky Way1–3 and whose origin is debated4–6. According to a possible explanation, these black holes may have formed from density
If such black holes existed in the Milky Way dark matter halo, they would cause long-timescale gravitational microlensing events lasting years. Here, we present the results of the search for the long-timescale microlensing events among the light curves of 78.7 million stars located in the ...
…A counterfeit, in Late Antiquity and the Middle Ages, was something else altogether: it was an obvious distortion mocking the original; in a Christian cosmology, a counterfeit was Lucifer’s mockery of God’s creation. The closest concept to it that we have today are the inhabitants of DC...
The very first stars to form in the Universe were different than the stars today: metal-free, extremely massive, and destined for a supernova surrounded by a cocoon of gas. There was a time, prior to the formation of stars where only clumps of matter, unable to cool and collapse, remain...