Classical gravity proven wrong?

In the early 1980’s, Mordehai Milgrom proposed that Newton’s law of gravity could be modified as a replacement for dark matter. Three researchers now claim that gravity in the regime of extremely small accelerations fail, and that they have proven it.
Modified Newtonian Dynamics (MOND) were proposed to explain the galaxy …

Small Bangs: The comeback of white holes?

Gamma-ray bursts are flashes of gamma rays, associated with the most energetic explosions in the universe. Could some of them be white holes? This is the new proposal of Alon Retter and Shlomo Heller, describing white holes as “small bangs”.
Gamma-ray bursts are classified in two categories: long gamma-ray bursts, and …

Is there a place for God in astrophysics?

Recently, the famous British physicist Stephen Hawking stirred up religious communities with his statement “There is no Heaven, it’s a fairy story”. I am not going to cover Hawking’s interview with the Guardian once more, as it has already been done many times, but I would like to discuss the …

A pencil, a chessboard, and the structure of spacetime

Space and time form a boundless continuum, which is curved by massive objects. But what does the fabric of spacetime look like? In general relativity, it is smooth and continuous. Two researchers now claim that space could be divided into discrete locations, and thereby explain the peculiar intrinsic angular momentum …

Astronomy Quiz #2

Here is the new astronomy quiz! A lot of you answered the previous one, and as I wrote last week, I’ll post a new quiz regularly. I hope you will enjoy this one too, and don’t hesitate to give me some feedback and comments so that I can keep improving these quizzes!

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