Once a solid planet has formed, it may continue growing by capturing gas from the protoplanetary disk. To do so, though, it must act quickly. Young stars and protostars are known to be sources of strong stellar winds and intense radiation that can quickly disperse the gaseous remains of the accretion disk. Gaseous planets such as Jupiter probably have only about 10 million years or so to form and to grab whatever gas they can. Tremendous mass is a great advantage in a planet’s ability to accumulate and hold on to the hydrogen and helium gases that make up the bulk of the disk. Because of their strong gravitational fields, more massive young planets are thought to create their own mini accretion disks as gas from their surroundings falls toward them. What follows is much like the formation of a star and protoplanetary disk, but on a smaller scale. Just as happens in the accretion disk around the star, gas from a mini accretion disk moves inward and falls onto the solid planet.