Collect every planet, moon and asteroid. You've got 0.2%.
Collect every planet, moon and asteroid that has ever orbited the Sun — pile them together, every last fragment of rock and ice in the solar system — and you still haven't reached a single quarter of one per cent of the total mass. The Sun holds the other 99.8% on its own. About 1.3 million Earths could fit inside it by volume. Every second, it fuses around 600 million tonnes of hydrogen into helium, and that relentless burning is precisely what keeps every planet locked in its orbit. Jupiter, Saturn, the whole lot — they exist because the Sun permits it. We tend to think of the solar system as this rich collection of worlds. Really, it's one enormous star with some dust around it. Follow Deep Field Vault for more of the universe, served straight.