Stars go supernova all the time. How close to Earth could a supernova be to wipe our life away?
Are there any stars that are big enough to eventually go Nova and close enough to Earth to wipe out all life here in such a case?
How often do stars in our universe die? Does all the stars die in an explosion? Could stars be considered alive? Do stars revolve around the sun in our solar system? Are there more stars in the universe or grains of sand on earth? Is it possible that there's "no night" on planets orbiting in a binary star system? What are the chances for such planets to be habitable? Is it possible for a star to orbit a planet?  Has it ever been observed? How many light years away is closest star? Are stars alive? Is there life beyond Earth in our Solar System? Do stars and planets really affect human lives according to astrology? How? Would it be possible for a planet to orbit two stars in a figure eight pattern? Are all the stars in the sky, suns? Could gamma rays destroy the earth? What keeps stars or planets stable? Why are all the stars so far away from the Sun? Do all planets have to orbit a star? Can Star Destroyers destroy a planet? Will the planets eventually fall onto the sun? Are stars moving? If so, at what time and why? What happens to a planetary system when its sun dies? Is every star as big as the moon? Do you think there are more stars than grains of sand in the world? What will happen to the outer gas giants when our sun is in its red giant phase? Why do stars die? Is it sad that other planets in our solar system look so lifeless? Would Darkseid be able to destroy a star? Would there be life on other planets in our solar system? How does the positioning of stars and planets affect our lives? How many stars are there in sky?