The 5th Conference on Astrophysics and Space Science (APSS 2018) will be held in Sanya, China during December 1-3, 2018. APSS is an annual regular conference since 2015 and has been successfully held in Shanghai, China and Bangkok, Thailand. APSS 2018 will be a valuable and important platform for inspiring Int’l and interdisciplinary exchange at the forefront of Astrophysics and Space Science. Sanya is superior in geography climate and natural resources. It is known as “the oriental Hawaii" and “Sunshine City” because of its special tropical scenes as well as its attractive nature. Sanya's tourist resources, richly endowed by nature, are not only special in China, but also rare in the world. It is a most fashionable place where tropical marine tourist resources are closely concentrated and lovers of swimming can enjoy their holidays in winter. Within the city, well-known tourist spots are dotted everywhere--the national Yalong Tourist Area, the Tianyahaijiao, the Great Eastern Sea, the Luhuitou Peninsula, Sanya Bay and the Luobi Grotto. Besides these, there remain the ancient Yazhou City and relics and a sculpture of the Monk Jianzhen of the Tang Dynasty, who landed ashore to avoid the storm when he was sailing eastwards to Japan. The aim of APSS 2018 is to provide a stage for researchers, engineers, academicians as well as industrial professionals from all over the world to present their research results and development activities in Astrophysics and Space Science. We are looking forward to your participation! All the accepted papers will be published by a peer-reviewed open access journal that can ensure the widest dissemination of your published work. Call For Papers Celestial mechanics Cosmic rays and gamma astronomy Cosmology Earth-moon system Earth's surface Extragalactic astronomy Extrasolar planets Heliospheric physics Interstellar matter Planets ionospheres & magnetospheres Life sciences as related to space Magnetospheric physics Miscellaneous Planets, comets, asteroids & dust Scientific instrumentation Solar and stellar physics Solar terrestrial physics Solar terrestrial relations Interstellar terrestrial relations Theoretical astrophysics High-energy astrophysics Particle astrophysics