neutron stars

1. A typical star that is the source of light and heat for the planets in the solar system.
5. Earth's yearlong elliptical orbit around the sun
6. A celestial body moving in an elliptical orbit around a star.
10. the planet with the fastest orbit
11. Caused by the tilt of Earth on its axis as it revolves around the Sun
12. the Physical universe

2. The seventh planet from the sun
3. A mixture of gases that surrounds a planet or moon.
4. the weight of the sun
7. Third planet from the sun
8. smaller chunks of small matter, that burn up in our atmosphere called shooting stars
9. A small body of rock, ice, and cosmic dust that follows in an elliptical orbit around the sun and that gives off gas and dust in the form of a tail as it passes close to the sun
13. The curved path of a celestial object or spacecraft around a star, planet, or moon, esp. a periodic elliptical revolution