|
What is a similar spiral galaxy?
|
|
What are star clusters?
|
|
In what place is the Earth located on the galaxy?
|
|
What is the Milky Way?
|
|
What is a galaxy?
|
|
What is an antimatter?
|
|
What is called the smallest particle?
|
|
What element was formed first?
|
|
What does everything hold on?
|
|
What are particles?
|
|
What made the universe?
|
|
How did iron form?
|
|
How did the atoms form?
|
|
What is a black hole?
|
|
How many black holes exist?
|
|
What is the size of a black hole?
|
|
What's going on inside a black hole?
|
|
How do astronomers measure distances?
|
|
What is the distance to the dawn?
|
|
What is the distance from the earth to the sun?
|
|
How did you measure the distance to the Sun for the first time?
|
|
Are the stars gone?
|
|
The moon is our neighbor
|
|
What is a red shift?
|
|
What is a parsec?
|
