Astronomy: The Sun, Our Star Flashcards

The surface temperature of the sun is 5800K and its central temperature is 15 million kelvin.

The sun is a G2V star.

91.2% Hydrogen, 8.7% Helium, 0.1% other.

<p>The sun is 109 times bigger than the radius of the Earth.</p> Signup and view all the answers

<p>The outward pressure force balances the inward gravitational force everywhere inside the sun.</p> Signup and view all the answers

<p>Gravity.</p> Signup and view all the answers

<p>Pressure force.</p> Signup and view all the answers

<p>To make energy and move it to the surface and then out to space.</p> Signup and view all the answers

<p>Thermonuclear core, radiative zone, convective zone.</p> Signup and view all the answers

<p>This is the central region of the sun where fusion takes place due to high temperatures and pressure.</p> Signup and view all the answers

<p>A region inside the star where energy is transported outward by the movement of photons.</p> Signup and view all the answers

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

<p>A layer inside a star where energy is transported outward by means of heat flow through the gases of the star.</p> Signup and view all the answers

<p>Some big stars start with the thermonuclear core, then the convection, and then radiation.</p> Signup and view all the answers

<p>It is the way we can see into the sun's inner core, like a seismic motion going through the sun.</p> Signup and view all the answers

<p>We can see the red and blue shift of gases on the star's surface.</p> Signup and view all the answers

<p>Thermonuclear fusion at the sun's core is the source of the sun's energy.</p> Signup and view all the answers

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

<p>Fission is taking one large atom and breaking it apart and it releases energy.</p> Signup and view all the answers

<p>Fusion is taking two small molecules and smashing them together and that creates energy.</p> Signup and view all the answers

<p>Stars are mostly made of hydrogen which is a small atom, so it uses fusion.</p> Signup and view all the answers

<p>The main part is 4 hydrogen atoms put together to make 1 helium atom.</p> Signup and view all the answers

<p>An electron with a positive charge.</p> Signup and view all the answers

<p>Proton-proton chain.</p> Signup and view all the answers

<p>They use the 6 step cycle which is the CNO cycle.</p> Signup and view all the answers

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

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