Cosmic Mysteries 1-22
22 entries in the Cosmic Mysteries compendium.
Dark matterInvisible matter inferred from gravitational effects on cosmic scales.Dark energyHypothetical energy driving the universe's accelerating expansion.Fast radio burstsTransient radio bursts of unknown high-energy astrophysical origin.The Wow! signalA 72-second radio anomaly that remains unexplained.Tabby's StarA binary star with unexplained, irregular dimming events.OumuamuaFirst confirmed interstellar object to pass through the Solar System.The Fermi paradoxA paradox questioning the absence of extraterrestrial evidence.The Drake equationProbabilistic argument estimating communicative extraterrestrial civilizations in the MilkThe Great FilterHypothesis that an improbable step limits detectable extraterrestrial civilizations.SETIScientific efforts to detect signals from intelligent extraterrestrial life.Black holesAn astronomical body whose gravity prevents anything, including light, from escaping.Sagittarius A*Supermassive black hole at the center of the Milky Way.Gamma-ray burstsExtremely energetic explosions in distant galaxies.The Great AttractorA gravitational anomaly drawing galaxies toward the Norma region.The cosmic microwave backgroundRelic radiation from the early universe.Neutron starsGravitationally collapsed cores of massive stars, second only to black holes.MagnetarsNeutron stars with the most powerful magnetic fields in the universe.The heat death of the universeHypothesis that the universe will reach maximum entropy.The Roswell incidentDecades later, the incident became the foundation for UFO conspiracy theories alleging a gThe Phoenix LightsWidely sighted UFO event later attributed to military aircraft and flares.Area 51Classified USAF facility central to experimental aircraft testing and UFO lore.The Rendlesham Forest incidentA series of UFO sightings near a US air base in England.
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