Content Exploration Quiz

Nebulae are giant clouds of gas and space dust. Stars form from nebulae as gravity pulls the hydrogen atoms together and the gas and dust collapse to form a protostar.

The collapsing gas and dust get hotter and hotter as the protostar grows.

The collapsing gas and dust eventually reach temperatures of 15 billion °C.

<p>During nuclear fusion, protons from ionized hydrogen atoms collide and join together to create heavier atoms.</p> Signup and view all the answers

<p>The second lightest element after hydrogen is helium.</p> Signup and view all the answers

<p>Nebulae are giant clouds of gas and space dust. Stars form from nebulae as the gas and dust collapse under gravity, forming a protostar which eventually becomes a star.</p> Signup and view all the answers

<p>15 billion °C</p> Signup and view all the answers

<p>Nuclear fusion</p> Signup and view all the answers

<p>Helium</p> Signup and view all the answers

<p>Astronomers wonder where stars came from and what will become of them.</p> Signup and view all the answers