"Mars: Easy Crossword Puzzle": HTML5 Crossword

Across

5. The person who discovered Mars with a telescope (7,0,0)
7. The Roman god of war, after whom Mars is named (4,0,0)
8. The two small moons of Mars (6,3,6,0,0)
9. The first spacecraft to reach Mars (7,0,0)
11. The largest canyon system on Mars (6,0,0)
12. The agency that successfully landed InSight on Mars (4,0,0)
13. The spacecraft that discovered evidence of liquid water on Mars (4,7)
15. The number of moons orbiting Mars (3,0,0)

Down

1. The first successful mission to Mars (6,0,0)
2. The closest point in Mars' orbit to the Sun (10,0,0)
3. The first successful Mars orbiter (4,6,8,0,0)
4. The largest volcano on Mars (7,0,0)
6. The thin layer of atmosphere on Mars (6,0,0)
10. The iron oxide that gives Mars its reddish color (4,0,0)
14. The Martian day, equivalent to 24.6 Earth hours (3,0,0)