Stars questions This is a list of recently added questions about stars. Play stars quiz and see all the questions. How many stars are there on USA flag?50. There are 50 starts on the USA flag, one for each state of the Union. Previous version contained 49 stars. It had been used for 1 year merely between 1959, when Alaska was proclaimed a state, and 1960, when Hawaii got admitted into the Union.Created by: smyruhard 56% 4848583505017795151735555578flags riddles » The closest star to Sun is Proxima Centauri. In which direction we would need to look to see it on the night sky?It is not visible at all. Proxima Centauri is a red dwarf and its average brightness is very low. That is why even though it is closest to Sun, it was discovered not until in 1915.Created by: Ineshard 54% Great BearGreat Bear1186SiriusSirius1358CassiopeiaCassiopeia838it is not visible at allit is not visible at all4103astronomy riddles » Which stars live the longest in the universe?Little stars. Large and super-massive stars rapidly burn out. The lifetime of the blue supergiant is only a few tens of millions of years. Meanwhile, the small red dwarfs emit small amounts of energy and burn out very slowly - it is estimated that they may shine through the hundreds of billions of years.Created by: Krzysztof Moskalhard 54% supermassive starssupermassive stars596big starbig star231little starslittle stars2397the mass of the star has no effect on its lifetimethe mass of the star has no effect on its lifetime1152astronomy riddles » What is the stellar day?23 h 56 min 05 s. Sidereal time is a time-keeping system astronomers use to keep track of the direction to point their telescopes to view a given star in the night sky. It is a time scale that is based on the Earth's rate of rotation measured relative to the fixed stars rather than the Sun. Created by: Krzysztof Moskalaverage 65% 23 h 56 min 05 s23 h 56 min 05 s278424 h 10 min 07 s24 h 10 min 07 s75125 h 22 min 09 s25 h 22 min 09 s39626 h 05 min 11 s26 h 05 min 11 s288time riddles » Which star is called the "Dog Star"?Sirius (also known as dog-days, the Dog Star, and α CM) is the brightest and one of the closest stars of the night sky, located in the constellation Canis Major (Latin for "Great Dog").Created by: Krzysztof Moskalaverage 64% SiriusSirius4195Proxima CentauriProxima Centauri1113Northern StarNorthern Star532WegaWega704dogs 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 31% supermassive starssupermassive stars108quasarsquasars381gamma-ray burstgamma-ray burst581supernovasupernova801astronomy riddles » What is the densest substance in the universe?Neutron star. A neutron star is a stellar remnant of a supernova. Neutron stars are very small, but extremely dense - with a radius of only about 12–13 km (7 mi), they can have a mass of about two Suns.Created by: globalquiz.orghard 59% osmiumosmium1848diamonddiamond1278core of the Suncore of the Sun1479neutron starneutron star6694physics riddles » What star sign would you be if you were born on the 1st of Januray?Capricorn. The zodiac system was developed in Babylonia, some 2,500 years ago. Since then, the zodiacal signs and the constellations associated with them are drifting apart due to the precession of equinoxes with a clockwise (westward) precession of 1.4 degrees per century. For Western astrology, this means that the tropical sign of Aries currently lies somewhere within the constellation Pisces.Created by: globalquiz.orgeasy 78% CapricornCapricorn4763AquariusAquarius792TaurusTaurus222LibraLibra256astronomy riddles » Which direction was the camera pointing at while taking this picture?North. The entire celestial sphere seems to rotate slowly around the North-South axis of Earth's rotation. So the camera must have been pointed North or South, depending on the hemisphere the photo was taken at. But the bright star in the center must be Polaris, as the south celestial pole currently lacks a bright star to mark its position. Created by: globalquiz.orgaverage 63% NorthNorth7757SouthSouth1681EastEast1472WestWest1281photography riddles » How many typical stars can supernova be luminous as?One hundred billion stars. Supernovae are extremely luminous and often briefly outshine an entire galaxy. No supernova has been observed in the Milky Way since 1604, but they are often observed in distant galaxies.Created by: globalquiz.orghard 52% ten typical starsten typical stars461one thousand typical starsone thousand typical stars1145one million starsone million stars2159one hundred billion starsone hundred billion stars4243light riddles » Play astronomy quiz and see all the questions.