Looking through telescopes

You can see about 2000 stars with your ?

(a)  

It takes Venus (a)   days to go around the Sun.

The next time we will be able to see five planets in the night sky wont be until (a)  

In (a)   , the telescope was invented.

Galileo could see mountains and (a)   on the Moon with his improved telescope.

Scientists used pictures taken through __________ to plan the first Moon _______ in ____

(a)  

What important telescope was placed in Earth's orbit in 1990?

(a)  

Because the telescope is high above Earth's (a)   , it gets a clear view of outer space.

The Hubble Space Telescope has helped astronomers to determine the ____ and ___ of our universe.

(a)