Do galaxies interact?
Which planet in our solar system has the most circular orbit?
What is super galaxy?
Tell me how many stars are there in the whole universe?
In which constellation is abig nebula still giving birth to stars?
Give the common name for the phenomenon which is the result of sunlight reflecting off the earth and faintly illuminating the darkened portion of the moon?
Why these stars are called novae?
Is there water in moon rock?
How long is a day on saturn?
Describe the venus atmosphere?
A solar eclipse can only occur at?
The 29 days it takes the moon to complete an orbit around the earth is called a?
The kappa cygnids and the northern delta aquarids are names for what phenomena?
Explain how was the moon formed?
Most astronomers believe that these celestial bodies are at the center of quasars and are the main reason for their large energy emissions?