http://www.newsweek.com/what-sun-made-more-metal-hydrogen-helium-1710495

Astronomers have found that the sun is more metallic than we previously thought, potentially solving an astronomical mystery that scientists have grappled with for years.

The sun is Earth's closest star and the source of all life on Earth. Without it, plants couldn't photosynthesize and oxygen abundance would plummet. We'd also bump into things a lot more.