How Do Gravity & Pressure Keep Nebulas From Collapsing?

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A nebula is an interstellar cloud that is comprised of dust and light elements such as hydrogen and helium. Find out about ho gravity and pressure keep nebulas from collapsing with help from an applied physics professional in this free video clip.

Part of the Video Series: Such Great Physics
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Hello, my name is Walter Unglaub, and this is how do gravity and pressure keep nebulas from collapsing. A nebula is an interstellar cloud that is comprised of dust and light elements such as hydrogen and helium. Now when it comes to a nebula in outer space, there are two predominant types of forces that maintain its shape and keeps it from collapsing. Indeed because the nebular is made up of ejected material from super nova and this material has mass, it will all be gravitationally attracted to itself. So there will be an internal force due to all of the material that will attempt to collapse the nebula. This would be a gravitational force from all of the mass. However, there is a counter acting force and this is the pressure. The pressure due to all the dust pushing outward from the ejected material from the super nova that occurred and also from all the ionized particles and radiation. So this pressure will push and counteract against the force of gravity which is a purely attracted force and this is what's going to keep the nebular from collapsing in on itself. My name is Walter Unglaub and this is how do gravity and pressure keep nebulas from collapsing.

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