Top 10 universe facts Selected as the most interesting among astronomy related questions in Astronomy quiz What are the most luminous objects in the universe?Quasars. A quasar is an extremely energetic source of radiation powered by accretion disc around galaxy's central supermassive black hole. Quasars were much more common in the early universe, as all known quasars are extremely distant.Created by: globalquiz.orgtime facts » 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 Moskalstars facts » 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 space facts » 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: smyruastronomy facts » 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 DąbrowskaSun facts » 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 Kotułaastronomy facts » 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 astronomy facts » 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 astronomy facts » 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 astronomy facts » 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: smyruEarth facts » Play astronomy quiz and see all the questions.