42 Questions
What is the definition of a galaxy?
A massive collection of stars, gas, and dust held together by gravity
What is the name of the arm where our Sun is situated?
Orion Arm
What is the speed at which our Solar System travels around the galaxy's center?
250 km/s
What is the name of the central part of the galaxy?
Galactic Bulge
What is the name of the region filled with dust, gas, and hot young stars?
Galactic Disk
How many major spiral arms does the Milky Way have?
5
What is the name of the ancient Greek term for the Milky Way?
Galaxies Kuklos
What appears as dark wisps in the bluish regions of the galaxy?
Dust lanes
How long does it take the Sun to complete one orbit around the galactic center?
225 million years
What is the shape of the Milky Way galaxy when viewed from the side?
A giant fried egg
What can be seen above and below the plane of the galaxy disk?
Fewer stars
What is the approximate age of the oldest stars in the Milky Way's globular clusters?
12.5 billion years
What is the hazy band of light seen in the night sky when observing the Milky Way from Earth?
The dense concentration of stars in the Sagittarius Arm
How many globular clusters does the Milky Way have?
160
What is the primary force that holds the Milky Way galaxy together?
Gravity
What is the approximate number of stars in the Milky Way galaxy?
200 billion
What is the characteristic of the stars in the galactic bulge?
They are cool and old
What is the shape of the Milky Way galaxy when viewed from above?
Spiral
What is the purpose of the galaxy's spiral arms?
They are regions of star formation
What is the movement of stars in the Milky Way galaxy?
They revolve around the galaxy's center
What can be observed from Earth when viewing the Milky Way galaxy?
A hazy band of light with dark patches
What is the characteristic of the galaxy disk?
It contains younger stars and dust
What is the main reason why it takes so long for the Sun to complete one orbit around the galactic center?
The galaxy is extremely large
What can be observed in the Sagittarius Arm when looking towards the galaxy's center?
A dense concentration of stars
What is the characteristic of the stars found in globular clusters?
They are old and tightly packed together
What is the age of our Sun compared to the oldest stars in the Milky Way's globular clusters?
Younger
What is the shape of the Milky Way galaxy when viewed from an angle?
A giant fried egg
What can be seen above and below the plane of the galaxy disk?
Fewer stars
What is the primary reason why the Milky Way appears as a hazy band of light in the night sky?
Because of the scattering of light by dust and gas in the galaxy disk
What is the characteristic of the stars in the Norma Arm?
They are younger and hotter than the stars in the Perseus Arm
What is the purpose of the galaxy's central bulge?
It is a region of older stars and low star formation
What is the movement of the stars in the Milky Way galaxy with respect to the galaxy's center?
They are revolving around the center
What is the characteristic of the galaxy disk?
It is a region of younger stars and high gas content
What is the reason why the Milky Way galaxy appears as a giant spiral when viewed from above?
Due to the distribution of stars and gas in the galaxy
What is the characteristic of the stars in the galaxy bulge?
They are older and cooler than the stars in the galaxy disk
What is the primary force that holds the Milky Way galaxy together?
Gravity
What is the primary reason why the Milky Way galaxy appears as a giant fried egg when viewed from the side?
As a result of the galaxy's disk being much wider than it is thick
What is the significance of the globular clusters in the Milky Way galaxy?
They contain hundreds of thousands of ancient stars
What is the relationship between the age of the oldest stars in the Milky Way's globular clusters and the age of the Universe?
The oldest stars in the globular clusters are almost as old as the Universe
What is the significance of the Sagittarius Arm in the Milky Way galaxy?
It is the dense concentration of stars visible from Earth as a hazy band of light
What is the primary reason why the Milky Way galaxy takes approximately 225 million years to complete one orbit around the galactic center?
Due to the immense size of the galaxy
What is the significance of the age of our Sun compared to the oldest stars in the Milky Way's globular clusters?
Our Sun is younger than the oldest stars in the globular clusters
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