| A | B |
|---|
| asteroid | Any of numerous small, often irregularly shaped rocky bodies that orbit the Sun primarily in the asteroid belt, a region between the orbits of Mars and Jupiter. |
| asteroid belt | region of space between the orbits of Mars and Jupiter in which most asteroids are located. |
| comet | a small body of ice, gas and cosmic dust |
| comet tail | generally points back along the comet path |
| meteoroid | a very small rocky body that revolves around the sun |
| moon | a natural satellite of a planet |
| nuclear fusion reaction | how the Sun makes it's energy |
| orbit | The path of a celestial body or an artificial satellite as it revolves around another body. |
| prominence | A tonguelike cloud of flaming gas rising from the sun's surface |
| solar flare | A sudden eruption of magnetic energy released on or near the surface of the sun |
| solar wind | A continuous stream of plasma ejected by the Sun, flowing outward from the corona |
| star | Any of the celestial bodies visible at night from Earth as relatively stationary, usually twinkling points of light. |
| sun | main source of energy for our universe |
| sunspot | a cooler, dark spot on the sun's surface |
