Question 9

What is the brightest star that can be seen from Earth?

Yes, well done!

No, the moon is a big rock that goes around the Earth and reflects the light from the sun, just like a mirror

No, Mars is a planet, like the Earth, andgoes around the sun

Sirius is the brightest star in the night sky. Travelling at the speed of light it would take eight and a half years to get there (it's 2.64 parsecs away)