Across
- 5. This planet is home to many people.
- 8. This famous constellation consists of seven bright stars.
- 9. The name of the Galaxy that contains the Solar System.
- 12. The first spaceflight to land humans on the moon.
- 13. A group of stars that form well known patterns in the sky.
- 14. This star accounts for 99.86% of the mass in the solar system.
- 15. This planet was discovered in 1781 by William Herschel.
- 16. A system of billions of stars, gas and dust, held together by gravitational attraction.
Down
- 1. A year on this planet lasts 165 Earth days.
- 2. This planet has the most craters in the Solar System
- 3. A day on this planet is about 40 minutes longer than a day on Earth.
- 4. The first person to set foot on the moon.
- 6. This is the Earth's only natural satellite.
- 7. This planet has 67 moons.
- 8. This is a spiral Galaxy that is 2.73 million light-years away from Earth.
- 10. This planet orbits the sun every 29.4 Earth years.
- 11. This planet is named after the Roman goddess of love and beauty.