By looking up during a magnificent cloudless night, far from city pollution, we can admire all these luminous points that dot the sky. Points that we think are immutable on the scale of a human life, and yet … Over the course of observations, we notice that some of these small spots of light have disappeared from astronomical clichés that are (only) 70 years old. The number of these missing stars could exceed hundreds of thousands – while a few more have appeared without further explanation.
Where have they gone? What are the natural phenomena that allow distant suns to go from the visible to the invisible in a few decades? Are the extraterrestrials there for something? So many legitimate questions which are today the subject of a real scientific investigation started by the team of the Vasco network (English acronym whose translation would be: sources disappeared and appeared during a century of observations). An investigation that you can also join thanks to a citizen science project.
At the time of the dinosaurs, the days lasted … 11:30 p.m.
The missing blue of the dwarf galaxy
In the Kinman dwarf galaxy, 75 million light years away, there was once a very massive blue star. This star, 2.5 million times brighter than the Sun, was observed by astronomers between 2001 and 2011. But when the Very Large Telescope of the European observatory austr
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