The planets of the solar system travel with the sun through millions of stars in our galaxy at a speed of about _____.

1. 1. 70,000 Km/hour
   2. 80,000 km/hour
   3. 85,000 km/hour
   4. 95,00 km/hour

The planet Neptune’s orbit around the sun takes about _____.

1. 1. 84 years
   2. 165 years
   3. 247.7 years
   4. 29.5 years

A light year, as a unit of measurement of distances of heavenly bodies, is equal to _____.

1. 1. 5 million, million kms
   2. 6 million, million kms
   3. 7 1/2 million, million kms
   4. 9 1/2 million, million kms

What are sun-spots?

1. 1. These are areas of the sun where nuclear fission takes place
   2. These are cooler areas which move about on the sun’s surface and show up as dark spots
   3. These are great flames of gases which shoot out of the sun
   4. These are areas of the sun where the heat is most intense which shows up as dark spots

Who was the second to observe sunspots after Ibn Zubir?

1. 1. Halley
   2. Newton
   3. Galileo
   4. Albert Einstein

The biggest star in our galaxy is _____.

1. 1. Proxima Centauri
   2. Epsilon Auriga
   3. Sirius
   4. Sun

which of the following planets has almost the same mass, size and density as the earth?

1. 1. Mars
   2. Saturn
   3. Venus
   4. Uranus

Which of the following makes the planet Saturn unique in the solar family?

1. 1. It sends out very strong radio signals which sound like the noise of sea waves
   2. It is the biggest among the planets
   3. It shows phases like those of the earth’s moon
   4. There is a well developed system of rings arounds it

The largest number of natural satellites (or moons) that any one of the planets of the solar system has is _____.

1. 1. 22
   2. 60 (mid 2006)
   3. 70
   4. 75

The only planet is the solar system which rotates on its axis from East to West is _____.

1. 1. Neptune
   2. Jupiter
   3. Earth
   4. Uranus