The "problem" of spiral galaxy rotation and dark matter
When Vera Rubin used spectroscopy to measure the rotation speed of matter in spiral galaxies around their center of mass, it came as a surprise to many scientists of her time.
Gas giants: how large planets were formed
Gas planets are celestial bodies composed of hydrogen and helium. That is, the same substances as ordinary stars. However, in terms of their size, mass and geophysical properties, they are still planets, albeit very similar to cold dwarfs located closer to the brown spectrum.
Mysteries of the Universe: how the object 1ES 1927+654 forms active galactic nuclei
Astronomers are baffled by the rapid and unexpected changes observed in the nearby active galactic nucleus (AGN), 1ES 1927+654. This mysterious astronomical object showed unprecedented variations in X-ray, ultraviolet and radio emissions from January 2022 to May 2023.
Electromagnetic waves and space expansion: myths versus reality
Question: Do electromagnetic waves stretch with the expansion of space?
A star that is forever swallowed by a black hole
Astronomers from the University of Leicester have described a unique astronomical event: a star 500 light-years away is regularly torn apart and swallowed by a black hole
Gravitational waves and the birth of black holes
Black holes, the most mysterious objects in the Universe, literally mock astronomers. They can have masses ranging from a few to billions of suns and arise from the death of stars. But how exactly do stars turn into black holes? And why do some black holes have mass, while others do not?
How Mesoamerican civilisations built their temples and pyramids
Ancient Egypt, pyramids and archaeological finds that are difficult to explain. A lot of fakes, outright manipulations, and even fakes. Endless books, popular films, and a lack of verified data. The first mythical pharaohs are known only from the legends of the Middle and New Kingdoms.