- A galaxy is a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. The word is derived from the Greek galaxias (γαλαξίας), literally ‘milky’, a reference to the Milky Way galaxy that contains the Solar System. Galaxies, averaging an estimated 100 million stars, range in size from dwarfs with less than a hundred million stars, to the largest galaxies known – supergiants with one hundred trillion stars, each orbiting its galaxy’s center of mass. Most of the mass in a typical galaxy is in the form of dark matter, with only a few percent of that mass visible in the form of stars and nebulae. Supermassive black holes are a common feature at the centres of galaxies.
- The Communist Manifesto (Wikipedia)
The Communist Manifesto (German: Das Kommunistische Manifest), originally the Manifesto of the Communist Party (Manifest der Kommunistischen Partei), is a political pamphlet written by Karl Marx and Friedrich Engels, commissioned by the Communist League and originally published in London in 1848. The text is the first and most systematic attempt by Marx and Engels to codify for widespread consumption the core historical materialist idea that, as stated in the text’s opening words, “the history of all hitherto existing society is the history of class struggles”, in which social classes are defined by the relationship of people to the means of production. Published against the backdrop of the Revolutions of 1848 and their subsequent repression across Europe, the Manifesto remains one of the world’s most influential political documents.