astronomy

knowledge of the stars

aster

star

onomy

knowledge of

constellation

patterns of stars in the sky

gravity

a force

NASA

National Aeronautics and Space Administrtion

eclipse

When the moon is between the earth and the sun, completely covering the sun, causing the moon to cast a shadow upon the earth.

orbit

The path an object or planet follows as it moves around the sun.

thermonuclear fusion

Nuclear reactions (controlled explosions) that happen on the sun that give it energy and power

atmosphere

The layers of gases and mist that cover a planet, such as the earth.

sunspots

Dark patches on the sun which are cooler than the rest of the sun.

rotate

To turn around a fixed point, the way a top spins in place or a planet spins on its axis.

auroras

Natural, colorful light displays in the sky that can be caused by solar flares.

solar flares

Large fires that burst out millions of miles from the sun, releasing energy into the solar system.

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