Stars questions This is a list of recently added questions about stars. Play stars quiz and see all the questions. 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: Inesastronomy riddles »hard 49% Great BearGreat Bear988SiriusSirius1132CassiopeiaCassiopeia685it is not visible at allit is not visible at all2740 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 Moskalastronomy riddles »hard 54% supermassive starssupermassive stars520big starbig star189little starslittle stars1991the mass of the star has no effect on its lifetimethe mass of the star has no effect on its lifetime985 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 Moskaltime riddles »average 65% 23 h 56 min 05 s23 h 56 min 05 s214124 h 10 min 07 s24 h 10 min 07 s59525 h 22 min 09 s25 h 22 min 09 s31426 h 05 min 11 s26 h 05 min 11 s238 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 Moskaldogs riddles »average 62% SiriusSirius3370Proxima CentauriProxima Centauri947Northern StarNorthern Star452WegaWega606 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 Moskalastronomy riddles »very hard 29% supermassive starssupermassive stars86quasarsquasars289gamma-ray burstgamma-ray burst430supernovasupernova637 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.orgphysics riddles »hard 58% osmiumosmium1587diamonddiamond1070core of the Suncore of the Sun1263neutron starneutron star5538 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.orgastronomy riddles »easy 78% CapricornCapricorn4182AquariusAquarius701TaurusTaurus193LibraLibra231 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.orgphotography riddles »average 63% NorthNorth6997SouthSouth1497EastEast1344WestWest1140 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.orglight riddles »hard 52% ten typical starsten typical stars422one thousand typical starsone thousand typical stars1010one million starsone million stars1973one hundred billion starsone hundred billion stars3775 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.Created by: Hà Linh Chitechnology riddles »hard 58% white dwarfswhite dwarfs1564brown dwarfsbrown dwarfs463red dwarfsred dwarfs743neutron starsneutron stars3890 Play astronomy quiz and see all the questions.