How many active volcanoes does the moon have?
Till date how many astronauts have set foot on the moon?
The moon is slowly moving away from the earth, but by how much distance each year?
How many natural satellite does venus has?
On which planet do we find Jovian atmosphere?
Name the nearest star to the sun.
Oldest stars in the galaxy belong to _______.
Which planet is named after the Greek god of underworld?
World's first star catalogue was made by an________.