Solve the crossword with the clues given. Down.
1.    A big ball of hot gases
2.    A constellation
Across
3.    They revolve around the Sun
4.    The phase where we see more than half the Moon
5.    The phase where we see less than half the Moon

You are a scientist going into space to study the planets. Which is the shortest path you can use to fly past all seven planets other than the Earth? You are not allowed to turn your spacecraft around once you start. Draw the path on a diagram of the Solar System to show your answer. 

Fill in the blank by identifying the person given in the image.

This person is called an _____.

Name the first dog to travel into space. 

What is the shape of our galaxy?   

Fill in the blank with the right word.

The sun, the moon, the stars and planets form the _____. (vacuum/ universe)

From the following which is the odd one out. Explain.

Saturn, Jupiter, Uranus, Gemini, Mars

Complete the space term. 

This is space _____.