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Learn the Sun’s role and its dominance in mass, distinguish planets and dwarf planets, and understand natural versus artificial satellites. 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Rocky planets and gas planets are distinguished, and satellites are either natural or man-made.","Answer",{"name":110,"@type":105,"acceptedAnswer":111},"Why does the Sun look like it was in the past?",{"text":112,"@type":108},"Light from the Sun takes about 8 minutes to reach Earth. If the Sun disappeared, it would still be visible for about 8 minutes due to this light travel time.",{"name":114,"@type":105,"acceptedAnswer":115},"How can you calculate the time taken for light to travel a distance?",{"text":116,"@type":108},"Use the relationship speed = distance/time. Rearrange to time = distance/speed, substitute the distance (e.g., an orbital radius) and the speed of light, then round and include units.","https://schema.org",{"og:url":83,"og:type":119,"og:title":65,"og:site_name":90,"og:description":67},"article",{"robots":121,"canonical":83},"index,follow",{"doc_id":123,"site_id":62},207463,1788599669,{"code":4,"msg":5,"data":126},{"doc_id":123,"user_id":127,"nickname":87,"user_avatar":128,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":129,"file_id":130,"file_url":131,"file_type":132,"file_size":133,"view_count":8,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":134,"language":135,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":136,"faqs":137,"seo_title":138,"seo_description":67,"update_tm":124,"read_time":139},2336475104042,"https://ap-avatar.wpscdn.com/avatar/22000c4c32af1715be0?x-image-process=image/resize,m_fixed,w_180,h_180&k=1786537525561427321","Head to www.savemyexams. com for more awesome resources  \n AQA GCSE Physics  \n8 .1 Solar system, Stability of Orbital Motions & Satellites  \nContents  \n 8.1.1 The Solar System  \n 8.1.2 The Formation of the Sun  \n 8.1.3 Fusion in Stars  \n 8.1.4 The Life Cycle of Solar Mass Stars  \n 8.1.5 The Life Cycle of Larger Stars  \n 8.1. 6 Circular Orbits  \n 8.1.7 Non-Circular Orbits  \n© 2015 − 2024 Save My Exams, Ltd. · Revision Notes, Topic Questions, Past Papers  \nYour notes  \nHead to www.savemyexams. com for more awesome resources  \n8.1.1 The Solar System  \nObjects in The Solar System  \n The Sun lies atthe centre of the Solar System  \n The Sun isa star which makes up over 99% of the mass of the solar system  \n There are 8 planets and an unknown number of dwarf planets which orbit the Sun  \n The gravitational |eld around planets is strong enough to have pulled in all nearby objects with the exception of natural satellites  \n The gravitational |eld around a dwarf planet is not strong enough to have pulled in nearby objects  \n There are 4 rocky planets: Mercury, Venus, Earth and Mars  \n There are 4 gas planets: Jupiter, Saturn, Uranus and Neptune  \n Some planets have moons which orbit them  \n Moons are an example of natural satellites  \n Arti|cial satellites are man-made and can orbit any object in space  \n The International Space Station (ISS) orbits the Earth and is an example of an arti|cial satellite  \n Asteroids and comets also orbit the sun  \n An asteroid is a small rocky object which orbits the Sun  \n The asteroid belt lies between Mars and Jupiter  \n Comets are made of dustand ice and orbit theSun in a diyerent orbit to those of planets  \n The ice melts when the comet approaches the Sun and forms the comet’s tail  \nThe objects in our solar system  \nYour notes  \n© 2015 − 2024 Save My Exams, Ltd. · Revision Notes, Topic Questions, Past Papers  \nHead to www.savemyexams. com for more awesome resources  \n Exam Tip  \nYou need to know the order of the 8 planets in the solar system. The following mnemonic gives the |rst letter of each of the planets to help you recall them:  \nMy Very Excellent Mother Just Served Us Noodles  \nMercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune  \nBefore Pluto was reclassi|ed as a dwarf planet in 2006 , ' my very excellent mother ' used to 'serve us ''Nine Pizzas ' and you can still use that one to remember the 'old ' solar system!  \nYour notes  \n© 2015 − 2024 Save My Exams, Ltd. · Revision Notes, Topic Questions, Past Papers  \nHead to www.savemyexams. com for more awesome resources  \nOur Place in Space  \n Our solar system is just one small part of the Milky Way galaxy  \n There are billions of stars in the Milky Way galaxy  \n Some of these stars also have planets which orbit them  \n The Universe is made up of many diyerent galaxies  \nOur solar system is just one out of potentially billionsin our galactic neighbourhood, the Milky Way. There are estimated tobe more than 100 billion galaxies in the entire universe  \nDistances between Planets in the Solar System  \n The planets and moons of the Solar System are visible from Earth when they re}ect light from the Sun  \n The outer regions of the Solar System are around 5 × 1012 m from the Sun, which means even light takes sometime to travel these distances  \n The light we receive on Earth from the Sun takes 8 minutes to reach us  \n The nearest star to us after the Sun is so far away that light from it takes 4 years to reach us  \n The Milky Way galaxy contains billions of stars, huge distances away, with the light taking even longer to be seen from Earth  \n The speed of light is a constant 3 × 108 m/s  \n Therefore, using the equation:  \nYour notes  \n© 2015 − 2024 Save My Exams, Ltd. · Revision Notes, Topic Questions, Past Papers  \nHead to www.savemyexams. com for more awesome resources  \nspeed = distancmee  \n The time taken to travel a certain distance can be calculated by rearranging to:  \ntime = dstancpee~~d~~e  \n Worked example  \nThe radius of Mercury 's","cbCaimYB0UcPWXw9","https://ap.wps.com/l/cbCaimYB0UcPWXw9","pdf",6252794,27,"English","# 8.1.1 The Solar System\n## Objects in the Solar System\n## Our place in space\n## Distances between planets in the solar system\n# 8.1.2 The Formation of the Sun\n# 8.1.3 Fusion in Stars\n# 8.1.4 The Life Cycle of Solar Mass Stars\n# 8.1.5 The Life Cycle of Larger Stars\n# 8.1.6 Circular Orbits\n# 8.1.7 Non-Circular Orbits","[{\"question\":\"What are the main objects in the Solar System and how are they classified?\",\"answer\":\"The Solar System contains the Sun, eight planets, an unknown number of dwarf planets, moons (natural satellites), artificial satellites, asteroids, and comets. Rocky planets and gas planets are distinguished, and satellites are either natural or man-made.\"},{\"question\":\"Why does the Sun look like it was in the past?\",\"answer\":\"Light from the Sun takes about 8 minutes to reach Earth. If the Sun disappeared, it would still be visible for about 8 minutes due to this light travel time.\"},{\"question\":\"How can you calculate the time taken for light to travel a distance?\",\"answer\":\"Use the relationship speed = distance/time. Rearrange to time = distance/speed, substitute the distance (e.g., an orbital radius) and the speed of light, then round and include units.\"}]","AQA GCSE Physics - 8.1 Solar system, Stability of Orbital Motions & Satellites - Revision Notes | PDF",68]