L6 Flashcards
Is our solar system the only one in the universe?
No, it is only one of billions.
What is a light year?
It is a distance, one light year means that it takes one year for light to travel a certain distance.
How far is the closest star to us excluding the sun?
4.22 light years or 39 quadrillion km.
Where is our solar system?
It is inside the galaxy called the Milky Way, the Milky Way is made up of about 200 billion different stars.
Are all galaxies the exact same?
No, they come in different shapes and sizes, ours is called a barrel spiral galaxy.
What is the radius of the Milky Way?
Approximately, 52,850 light years.
What is the diameter of the Milky Way?
105,700 light years.
How many galaxies are estimated to be in the universe?
200 billion to 2 trillion.
How would you compare the sizes of : the earth, human beings, the sun, the Milky Way, the solar system, the universe using symbols?
Human beings «_space;the earth < the sun < the solar system «_space;the Milky Way «_space;the universe.
