10 most difficult stars riddles A list of stars related questions that are most often answered incorrectly Astronomy quiz 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.very hard 31% supermassive starssupermassive stars5%quasarsquasars20%gamma-ray burstgamma-ray burst31%supernovasupernova42%Created by: Krzysztof Moskal. Statistics based on 1931 answers in 2 languages »universe 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.hard 53% ten typical starsten typical stars5%one thousand typical starsone thousand typical stars14%one million starsone million stars26%one hundred billion starsone hundred billion stars53%Created by: globalquiz.org. Statistics based on 8152 answers in 2 languages »light 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.hard 54% supermassive starssupermassive stars13%big starbig star5%little starslittle stars54%the mass of the star has no effect on its lifetimethe mass of the star has no effect on its lifetime26%Created by: Krzysztof Moskal. Statistics based on 4454 answers in 4 languages »astronomy 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.hard 55% Great BearGreat Bear15%SiriusSirius17%CassiopeiaCassiopeia11%it is not visible at allit is not visible at all55%Created by: Ines. Statistics based on 7843 answers in 4 languages »technology riddles » 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.hard 57% 484817%505057%515122%55552%Created by: smyru. Statistics based on 3575 answers in 2 languages »flags riddles » Stars of which type are the smallest in diameter?Neutron stars. A typical neutron star has a mass between about 1 and 2 solar masses, with a corresponding radius of just about 12 km. Some of them (pulsars), rotate as quickly as once per 33-millisecond, so their radius must be very small not to break the light speed limit at the surface level.hard 58% white dwarfswhite dwarfs23%brown dwarfsbrown dwarfs6%red dwarfsred dwarfs11%neutron starsneutron stars58%Created by: Hà Linh Chi. Statistics based on 7821 answers in 2 languages »technology 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.hard 59% osmiumosmium16%diamonddiamond11%core of the Suncore of the Sun13%neutron starneutron star59%Created by: globalquiz.org. Statistics based on 11613 answers in 2 languages »physics 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. average 63% NorthNorth63%SouthSouth13%EastEast12%WestWest10%Created by: globalquiz.org. Statistics based on 12392 answers in 2 languages »photography 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").average 64% SiriusSirius64%Proxima CentauriProxima Centauri16%Northern StarNorthern Star8%WegaWega10%Created by: Krzysztof Moskal. Statistics based on 6717 answers in 2 languages »dogs 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. average 66% 23 h 56 min 05 s23 h 56 min 05 s66%24 h 10 min 07 s24 h 10 min 07 s17%25 h 22 min 09 s25 h 22 min 09 s9%26 h 05 min 11 s26 h 05 min 11 s6%Created by: Krzysztof Moskal. Statistics based on 4326 answers in 4 languages »time riddles » Play astronomy quiz and see all the questions.