Top 10 astronomy facts Selected as the most interesting among astronomy related questions in Astronomy quiz Which astronomical discovery was nicknamed 'Little Green Man'?Pulsar. In 1967 Jocelyn Bell Burnell and Antony Hewish first observed pulses separated by 1.33 seconds, originated from the same location on the sky. It was not until a second pulsating source was discovered in a different part of the sky that the "LGM hypothesis" was entirely abandoned.Created by: globalquiz.orgdiscoveries facts » This is the aurora of Jupiter. What are the visible bright spots caused by?Jupiter moons. Jupiter's moons, especially Io (spot on the left), are powerful sources of auroras on Jupiter. These arise from electric currents along field lines, generated by a dynamo mechanism due to the relative motion between the rotating planet and the moving moon.Created by: globalquiz.orgplanets facts » What part of the Moon surface had been known to humanity before the first photos of the dark side were taken in 1959?59%. Moon's libration changes the angle from which the Moon is seen, allowing about 59% of its surface to be seen from the Earth (but only half at any instant). Moon's libration is caused by the eccentricity of its orbit around Earth and by a slight inclination of its axis of rotation.Created by: globalquiz.orgMoon facts » What kind of 'natural disasters' happen on the moon?Moonquakes are produced by tidal forces. Moonquakres are much less common and weaker than earthquakes, although they can last for up to an hour - a significantly longer time than terrestrial earthquakes - because of the absence of water to damp out the seismic vibrations.Created by: life-o-holicSolar System facts » The Moon takes just as long to rotate around its own axis as it does to revolve around the planet (Earth). How many other moons in the Solar System share this feature?Most of them. If the rotational frequency of satellite is larger than orbital frequency, a small torque counteracting the rotation arises, eventually locking the frequencies in a tidal lock. Pluto and Charon are the extreme example, being locked to each other.Created by: globalquiz.orgSolar System facts » This is an iron buoy. Where were its atoms formed?In a high-mass star preceding Sun. Radioactive nickel-56 (which decays to the most common isotope of iron) is the last element to be produced before the collapse of a supernova. That is why the iron was abundantly scattered into space after the supernova explosion.Created by: life-o-holicelements facts » Which famous astronomer was also a succesful sportsman?Edwin Hubble. In his younger days he was noted more for his athletic prowess than his intellectual abilities. He won seven first places in a single high school track and field meet in 1906. He also set the state high school record for the high jump in Illinois, and practiced amateur boxing.Created by: globalquiz.orgscientists facts » 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.orgspace facts » What is Brian May, the guitarist and songwriter of Queen, good at?Astrophysics. Brian May studied Mathematics and Physics at Imperial College London, graduating with B.Sc. degree with honours. He earned a PhD in astrophysics from Imperial College in 2007 and is the 4th and current Chancellor of Liverpool John Moores University.Created by: globalquiz.orgmusicians facts » Which planet is the brightest seen from Earth?Venus is much brighter than other planets. It is due to its proximity to the Sun (source of light), and bright clouds of sulfuric acid in its atmosphere.Created by: globalquiz.orgtechnology facts » Play astronomy quiz and see all the questions.