Across
- 3. The ___ of the Sun has an average temperature of 29,000,000 degrees Fahrenheit
- 5. A unit of measure that when multiplied by 1,392,082.56 is the diameter of the Sun
- 6. There are ___ of these planets, and they all have hard surfaces.
- 7. A 4.5 billion-year-old yellow dwarf star
- 9. The planet ___ is the closest to the Sun of these 4, and Mars is the farthest.
Down
- 1. The element that the Sun fuses into helium
- 2. This is the acronym that stands for the four planets that have an average diameter of 9129 km.
- 4. A system of rotating objects like planets, with the Sun in the middle
- 8. There core's are made mostly of ___ and nickel.