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 55% 4848493505014425151623555563flags 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 52% Great BearGreat Bear1117SiriusSirius1267CassiopeiaCassiopeia781it is not visible at allit is not visible at all3536astronomy 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 stars565big starbig star213little starslittle stars2246the mass of the star has no effect on its lifetimethe mass of the star has no effect on its lifetime1097astronomy 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 s258224 h 10 min 07 s24 h 10 min 07 s69525 h 22 min 09 s25 h 22 min 09 s36926 h 05 min 11 s26 h 05 min 11 s274time 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 63% SiriusSirius3919Proxima CentauriProxima Centauri1047Northern StarNorthern Star498WegaWega671dogs 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 29% supermassive starssupermassive stars103quasarsquasars348gamma-ray burstgamma-ray burst507supernovasupernova733astronomy 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 58% osmiumosmium1767diamonddiamond1210core of the Suncore of the Sun1398neutron starneutron star6253physics 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% CapricornCapricorn4549AquariusAquarius762TaurusTaurus209LibraLibra247astronomy 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% NorthNorth7486SouthSouth1606EastEast1435WestWest1240photography 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 stars447one thousand typical starsone thousand typical stars1093one million starsone million stars2093one hundred billion starsone hundred billion stars4090light riddles » Play astronomy quiz and see all the questions.