Category: Planets

Here’s Why Black Holes Are Crullers, Not Donuts

It’s been over 100 years since the first solution for a black hole was discovered in General Relativity. For generations, scientists argued over whether these objects were physical, existing all throughout our Universe, or whether they were mere mathematical artifacts. In the 1960s, Roger Penrose’s Nobel-winning work demonstrated how black holes could realistically form in […]

2I/Borisov: A Remarkably Pristine Interstellar Comet

The beauty of comet 2I/Borisov, the second interstellar object discovered in our Solar System, is that it looks and acts more or less like, well, an interstellar comet, without the puzzling characteristics of its predecessor, the still controversial ‘Oumuamua. 2I/Borisov’s cometary nature is clear in the latest observations from the European Southern Observatory’s Very Large […]

The Race to Find Alien Moons

In 1655 Dutch astronomer Christiaan Huygens set up a refractor telescope of his own construction and aimed it at Saturn. He thought the planet was encircled by a single solid ring and planned to observe its tilt, which astronomers knew changed over several years. Instead he saw something unexpected in his viewfinder: a giant moon, […]

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