The Horsehead Nebula is a dark nebula located in the Orion
The Nebular Theory
The nebular theory is a theory that the Sun and planets formed together from a cloud of gas and dust-a nebula.
The solar system began to form 5 billion years ago. Gravity pulled the particles of gas together making the nebula shrink. Pressure tended to push the particles apart, but overtime, gravity would win.
Steps of the formation of the solar system
a.Cloud of gas and dust condensing (nebula).
b. Center cloud of gas and dust heat up.
c. Disk forms as dust and gas rotate and contract.
d. Fusion begins and the star lights up; gas and dust blow away, inner rocky planets form.
e. Outer gas planets form, most of the rest of the gas and dust blow away.
The solar system began to form 5 billion years ago. Gravity pulled the particles of gas together making the nebula shrink. Pressure tended to push the particles apart, but overtime, gravity would win.
Steps of the formation of the solar system
a.Cloud of gas and dust condensing (nebula).
b. Center cloud of gas and dust heat up.
c. Disk forms as dust and gas rotate and contract.
d. Fusion begins and the star lights up; gas and dust blow away, inner rocky planets form.
e. Outer gas planets form, most of the rest of the gas and dust blow away.