Across
- 2. The distance between the Sun and the planet averages about 1.4 billion kilometers. It spins very fast, completing one rotation in about 10.5 hours. This is the planet with the most moons (146 moons) in our Solar System.
- 6. It has no moons, it is the richest planet in iron and it is the smallest planet in the Solar System.
- 9. The zone in the Sun, that is the outermost layer of the solar interior. It is about 200,000 kilometers deep and it transports energy from the edge of the radiative zone to the surface through giant convection cells.
- 14. The type of rotation that only Uranus and Venus have.
- 15. The process when two atomic nuclei combine, or "fuse," to form one heavier nucleus. It powers the Sun and other stars.
- 16. Just like cosmic snowballs, made of frozen gases, rocks, and dust and they can be the size of a small town.
- 18. Pieces of meteoroid that has reached Earth and the material is called ...
- 19. It is one of the brightest planets as seen from Earth, almost identical in size to Earth and has the hottest surface in the Solar System.
- 20. Rocky remnants left over from the early formation of our solar system about 4.6 billion years ago.
Down
- 1. The zone in the Sun where the energy is generated by nuclear fusion in the core moving outward as electromagnetic radiation.
- 3. This planet has around a 28 percent axial tilt and it experiences seasonal changes that are similar to Earth. This planet is the smallest gas giant and it is named after the Roman god of the sea.
- 4. One of the four types of solar eclipses, when the moon completely covers the Sun's disk, blocking all of the Sun's light
- 5. One of the four outer planets, with enormous magnetic field and dozens of moons. More than 1,321 Earths would fit inside this planet.
- 7. One of the two gasses that the Sun is primary composed of. One of the gasses is helium and the other one is ...
- 8. The theory of the formation and the evolution of the universe from a state of extremely high temperature and density.
- 10. The interior of the planet is primarily composed of ice and rocks. It is visible to the unaided eye as a blue-green point of light. It is also the coldest plane in the Solar System.
- 11. The name that is given to a storm in Jupiter’s southern hemisphere with crimson-colored clouds that spin counterclockwise at wind speeds that exceed those in any storm on Earth.
- 12. Small rocky or metallic bodies in outer space that orbit our star - the Sun.
- 13. A small planet that was excluded as part of the Solar System in 2006.
- 17. It is the outermost of the four inner terrestrial planets, also known as the Red Planet. It has two moons Phobos and Deimos.