When Your Gravity Fails and Negativity Don’t Pull You Through: The Case for Negative-Mass Dark Matter

In early December 2018 the physicists' blogosphere went berserk because of a 2017 paper (in fact still a preprint to this date: arXiv:1712.07962) in which the author James Farnes, University of Oxford, tries to explain Dark Matter and Dark Energy with a seemingly preposterous hypothesis: the presence of a negative-mass fluid that permeates the Universe. … Continue reading When Your Gravity Fails and Negativity Don’t Pull You Through: The Case for Negative-Mass Dark Matter

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Touring the Solar System

Recently, I have read a very recommended book called "The Interstellar Age: Inside the Forty-Year Voyager Mission" by Jim Bell (see its Goodreads entry). The book, as you can imagine from the title, recounts the story (so far) of the two Vogayer spacecrafts, and of the people who made this possible. There is also a … Continue reading Touring the Solar System

Simulate The Solar System with Processing

It's New Year's eve and it's time for horoscopes! Or maybe not. If you are a believer, or if you're not, it's still a good time to learn something more about celestial mechanics. We'll make use of Processing, an open source programming language and environment for people who want to create images, animations, and interactions. You … Continue reading Simulate The Solar System with Processing