Universe questions This is a list of recently added questions about universe. Play universe quiz and see all the questions. The idea that the nascent universe passes through the phase of exponential expansion, which was driven by the positive density of vacuum energy, is called;Cosmic inflation. Alan Guth formally proposed the idea of cosmic inflation in 1981, the idea that the nascent universe passed through a phase of exponential expansion that was driven by a positive vacuum energy density (negative vacuum pressure).Created by: Tschuka very hard 27% Cosmic inflationCosmic inflation1263Grand unification theoryGrand unification theory1204Theory of SupersymmetryTheory of Supersymmetry720All answers are correct.All answers are correct.1480space riddles » The celestial sphere is divided into ...88 constellations. The current list of 88 constellations recognized by the International Astronomical Union since 1922 is based on the 48 listed by Ptolemy in his Almagest in the 2nd century, with early modern modifications and additions In 1930, the boundaries between the 88 constellations were devised by Eugène Delporte along vertical and horizontal lines of right ascension and declination.Created by: Tschuka very hard 23% 22 constellations22 constellations22544 constellations44 constellations45366 constellations66 constellations32788 constellations88 constellations307astronomy riddles » What was the most beautiful comet of the second half of the twentieth century, with two tails visible to the naked eye?Comet Hale-Bopp. Hale–Bopp was discovered on July 23, 1995 separately by Alan Hale and Thomas Bopp prior to it becoming naked-eye visible on Earth. Comet Hale-Boppit was visible to the naked eye for a record 18 months, twice as long as the previous record holder, the Great Comet of 1811. Accordingly, Hale–Bopp was dubbed the Great Comet of 1997.Created by: Tschuka very hard 25% Halley's cometHalley's comet674Comet McNaughtComet McNaught75Comet Hale-BoppComet Hale-Bopp293There was no such cometThere was no such comet86astronomy riddles » Which of the constellations is the largest? (seen from the ground) Hydra is the largest of the 88 modern constellations, measuring 1303 square degrees. Also one of the longest at over 100 degrees, It has a long history, having been included among the 48 constellations listed by the 2nd century astronomer Ptolemy. It is commonly represented as a water snake. Created by: Tschuka very hard 26% Big DogBig Dog145HydraHydra386OrionOrion374Great BearGreat Bear544stars riddles » What properties do sunspots have?Lower temperature and strong magnetic field. Sunspots are temporary phenomena on the Sun's photosphere that appear as spots darker than the surrounding areas. They are regions of reduced surface temperature caused by concentrations of magnetic field flux that inhibit convection.Created by: Tschuka hard 47% Lower temperature and strong electric fieldLower temperature and strong electric field166Higher temperatureHigher temperature263Lower temperature and strong magnetic fieldLower temperature and strong magnetic field612These are holes in the photosphereThese are holes in the photosphere249Sun riddles » What is called as a hypothetical white hole?It's an opposite to black hole. According to theory, white hole could be a region of spacetime, where both energy and matter comes from singularity. Previous reserches doesn't proove their existence, although some reserchers state, that BIng Bang could be an example of such phenomenom.Created by: Piotr Kotułaaverage 68% It's a different name for quasarIt's a different name for quasar936It's an opposite to quasarIt's an opposite to quasar608It's a different name for black holeIt's a different name for black hole507It's an opposite to black holeIt's an opposite to black hole4487astronomy riddles » The Sun activity increases during every ...11 years. Basic period of time in which the activity of Sun is increasing is 11 years. It is visible on the chart.Created by: Katarzyna Dąbrowskavery hard 39% 5 years5 years70111 years11 years205922 years22 years9751300 years1300 years1475astronomy riddles » What object collided with Earth according to the giant impact hypothesis?A planet. According to the giant impact hypothesis Earth once collided with a planet of Mars size usually referred to as Theia, a titaness of Greek mythology, mother of Selene - Moon goddess, which is to reflect the believe the collision was an origin of the Moon. Created by: smyruhard 47% a cometa comet768a moona moon651an asteroid an asteroid 2577a planeta planet3651Earth riddles » Which of the following cosmic structures is the largest?Galaxy filaments are the largest known structures in the universe. They group galaxy superclusters, which in turn are formed by cluster composed of galaxies. Hercules–Corona Borealis Great Wall is considered the largest known structure of Universe. It is estimated to span 10 billions light years. Created by: smyruvery hard 32% GalaxyGalaxy1037Galaxy filamentGalaxy filament1323Galaxy clusterGalaxy cluster139SuperclusterSupercluster1603astronomy riddles » What is the source of the most powerful release of energy in the universe, second in scale only to the Big Bang?Gamma-ray bursts are the brightest in the universe, even brighter than the glare of quasars, second only to the brightness and power of the Big Bang. It is believed that arise during disruption of stars by black holes.Created by: Krzysztof Moskalvery hard 33% supermassive starssupermassive stars192quasarsquasars783gamma-ray burstgamma-ray burst1346supernovasupernova1749astronomy riddles » Play astronomy quiz and see all the questions.