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Hace 19 horas · Aliens is a 1986 science fiction action film written and directed by James Cameron.It is the sequel to the 1979 science fiction horror film Alien, and the second film in the Alien franchise.Set in the far future, it stars Sigourney Weaver as Ellen Ripley, the sole survivor of an alien attack on her ship. When communications are lost with a human colony on the moon where her crew first saw the ...
Hace 19 horas · In astronomy, dark matter is a hypothetical form of matter that appears not to interact with light or the electromagnetic field.Dark matter is implied by gravitational effects which cannot be explained by general relativity unless more matter is present than can be seen. Such effects occur in the context of formation and evolution of galaxies, gravitational lensing, the observable universe's ...
