29

How many planets are there in our Solar System? Most ………………… people would say that there are eight of them.

EDUCATE

30

Indeed, you may come across this ………………… in a school textbook on astronomy.

INFORM

31

However, there are those who would ………………… with this point of view. They believe that there are nine planets.

AGREE

32

In fact, ………………… , space researchers started to talk about a giant planet on the outskirts of the Solar System.

RECENT

33

The planet is too far away to be seen from the Earth. It is still invisible even to the ………………… Hubble Space Telescope.

POWER

34

However, the scientists have calculated its gravitational influence and are sure we are very close to a new amazing space ………………… .

DISCOVER