180 Questions
What is the term for a massive collection of stars, gas, and dust held together by gravity?
Galaxy
How many stars does the Milky Way Galaxy approximately contain?
200 billion stars
What is the name of the spiral arm that our Sun is situated in?
Orion Arm
What is the speed at which our Solar System travels around the galaxy's center?
250 km/s
What is the term for the central, spherical part of a galaxy containing older stars?
Galaxy bulge
What appears as a hazy band of light stretching across the sky when observed from dark, remote areas?
The Milky Way Galaxy
How many major spiral arms does the Milky Way Galaxy have?
5
What is the term for the flattened region of a galaxy containing most of its stars, dust, and gas?
Galaxy disk
What is the approximate distance across the Milky Way galaxy?
950 quadrillion kilometers
What is the shape of the Milky Way galaxy when viewed from the side?
A giant fried egg
What are the round fuzzy blobs above and below the plane of the galaxy disk?
Globular clusters
How many globular clusters does the Milky Way have?
160
What is the age of our Sun?
4.5 billion years
What is Proxima Centauri?
The closest star to our Solar System
What is the distance from Earth to Proxima Centauri?
40 trillion kilometers
What is a light year?
The distance that light travels in one year
Why do astronomers use light years to measure distance in space?
Because the distances in space are extremely large
What is the approximate distance from Earth to the Sun?
150 million kilometers
What is the main reason astronomers use units based on the speed of light?
To make the distances more manageable
How many times can light travel around the Earth in one second?
7.5 times
What is a light hour?
The distance light travels in one hour
How long does it take light to travel from the Sun to the Earth?
8 minutes
What is one light year equal to?
Nearly 10 trillion kilometers
How long does it take for light from an object one light year away to reach Earth?
One year
What is the distance from the nearest star to our solar system, Proxima Centauri?
4.24 light years
What is a galaxy:
A massive collection of stars, gas, and dust held together by gravity
How many galaxies are estimated to be in the Universe?
100 to 200 billion
What is beyond our Milky Way Galaxy?
Other galaxies and galaxy groups
What is the approximate distance from the Milky Way to the Andromeda Galaxy?
2.5 million light years
How many stars are typically found in small galaxies?
A few million
What is the shape of elliptical galaxies?
Elongated
What is the term for a large collection of galaxies that can span tens of millions of light years?
Galaxy Cluster
What is the shape of the Universe on the largest scales?
Sponge-like
What is the age of the Universe?
13.7 billion years
What is the term for the vast empty regions between galaxy clusters?
Voids
What is the Local Group part of?
A supercluster
Why do astronomers use units based on the speed of light to measure vast distances?
To make the numbers more manageable
What is the distance that light travels in one minute?
Light minute
What is the approximate distance from the Earth to the Moon in light seconds?
1.3 seconds
What is the reason for the hazy band of light seen in the night sky?
The dense concentration of stars in the Sagittarius Arm
What is the term for the large-scale structure of the universe, composed of galaxy clusters arranged in a thread-like formation?
Filament
What is the shape of the Milky Way galaxy when viewed from the side?
A giant fried egg
What is the term for the vast, empty regions of space with very few galaxies?
Void
How many galaxies are estimated to be in the Universe?
100 to 200 billion
What is the approximate age of the oldest stars in the globular clusters?
12.5 billion years
Why do astronomers use units based on the speed of light to measure vast distances?
Because these distances are too large to comprehend using standard units like kilometers
What is the term for a small collection of galaxies bound by gravity?
Galaxy group
What is the distance that light travels in one year?
Light year
What is the name of the constellation that is easily visible from South Africa, even in urban areas?
The Southern Cross or Crux
What is the term for a grouping of stars that, when observed from Earth, forms a recognizable pattern?
A constellation
What is the approximate distance from Earth to Proxima Centauri?
4.24 light years
What is the distance that light travels in one minute?
A light minute
Why does it take four years for light from Proxima Centauri to reach Earth?
Because Proxima Centauri is very far away
What is the name of the star system that consists of Alpha Centauri A, Alpha Centauri B, and Proxima Centauri?
The Alpha Centauri system
What is the approximate distance from Earth to the Sun?
150 million kilometers
What is the reason for the visibility of only a fraction of stars from urban areas?
Light pollution
What is the main characteristic of the stars found in the galactic bulge?
They are cool and older
What is the purpose of observing the Milky Way from dark, remote areas?
To see the hazy band of light stretching across the sky
What is the main component of the galactic disk?
Hot young stars and dust
What is the pattern of movement of the stars within the Milky Way?
They revolve around the galaxy's center
What is the characteristic of the spiral arms in the Milky Way?
They are regions of younger stars and nebulae
What is the appearance of the galaxy when observed from above?
A giant spiral
What is the characteristic of the dark wisps in the galactic disk?
They are dust lanes
What is the origin of the name 'Milky Way'?
It was given by the Greeks
What is the main characteristic of spiral galaxies?
They have a central bulge and spiral arms
What is the term for a collection of galaxies that can span tens of millions of light years?
Galaxy Cluster
What is the shape of the Universe on the largest scales?
Sponge-like
What is the term for the vast empty regions between galaxy clusters?
Voids
How many types of galaxies are there?
5
What is the approximate distance from the Milky Way to the Andromeda Galaxy?
2.5 million light years
What is the term for a small collection of galaxies?
Galaxy Group
What is the age of the Universe?
13.7 billion years
What is the main advantage of using units based on the speed of light to measure vast distances?
To make the units more relatable to everyday life
What is the approximate distance from the Earth to the Moon in light seconds?
1.28 light-seconds
What is the term for the large-scale structure of the universe, composed of galaxy clusters arranged in a thread-like formation?
Filament
What is the approximate distance from the nearest star to our solar system, Proxima Centauri?
40 trillion kilometers
What is the term for the vast, empty regions of space with very few galaxies?
Void
How many galaxies are estimated to be in the Universe?
100 to 200 billion
What is the distance that light travels in one year?
Nearly 10 trillion kilometers
What is the term for a small collection of galaxies bound by gravity?
Galaxy Group
What is the approximate distance that light can travel around the Earth in one second?
7.5 times
What is the term for a massive collection of stars, gas, and dust held together by gravity?
Galaxy
What is the characteristic of the stars found in elliptical galaxies?
Older stars with less gas and dust
What is the structure of the Universe on the largest scales?
A sponge-like structure with galaxy clusters
What is the term for the vast empty regions between galaxy clusters?
Voids
What is the characteristic of lenticular galaxies?
A central bulge and disk-like structure without spiral arms
What is the term for the large-scale structure of the universe, composed of galaxy clusters?
Filaments
What is the approximate distance from the Milky Way to the Andromeda Galaxy?
2.5 million light years
What is the characteristic of barred spiral galaxies?
A central bulge and disk-like structure with a bar-shaped structure
What is the term for the collection of galaxies that the Milky Way is part of?
Local Group
What is the approximate time it takes for 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 above?
Egg-shaped
What is the age of the oldest stars in the globular clusters?
12.5 billion years
What is the term for the distance that light travels in one minute?
Light Minute
What is the term for the grouping of stars that forms a recognizable pattern when observed from Earth?
Constellation
What is the approximate distance from Earth to the nearest star, Proxima Centauri?
40 trillion kilometers
What is the term for the brightest star among the Pointers in the Southern Cross constellation?
Alpha Centauri
What is the approximate distance across the Milky Way galaxy?
950 quadrillion kilometers
What is the term for the round fuzzy blobs above and below the plane of the galaxy disk?
Globular Clusters
What is the number of globular clusters in the Milky Way galaxy?
160
What is the primary characteristic that distinguishes the galactic bulge from the galactic disk?
Older and cooler stars
What is the significance of the spiral arms in the Milky Way galaxy?
They are regions of active star formation
What is the result of the Milky Way galaxy's structure when observed from above?
A giant spiral shape
What is the primary component of the dark wisps observed in the galactic disk?
Gas and dust
What is the motion of the stars within the Milky Way galaxy?
Revolution around the galaxy's center
What is the characteristic of the stars found in the galactic bulge?
Older, cooler stars
What is the significance of the Milky Way galaxy's appearance when observed from dark, remote areas?
It appears as a hazy band of light
What is the relationship between the Orion Arm and the other major spiral arms?
The Orion Arm lies between the Sagittarius and Perseus Arms
What is a characteristic of spiral galaxies?
They have a central bulge and spiral arms.
What is the term for the thin walls of galaxy clusters in the universe's large-scale structure?
Galaxy filaments
What is the term for the collection of galaxies that the Milky Way is part of?
Galaxy group
What is the approximate distance that light could travel in the age of the universe?
13.7 billion light years
What is the term for the vast, empty regions of space with very few galaxies?
Cosmic voids
What is the term for the large-scale structure of the universe, composed of galaxy clusters arranged in a thread-like formation?
Galaxy filaments
What is the term for a galaxy that does not fit into the other categories and has an irregular shape?
Irregular galaxy
What is the term for the formation of many galaxy clusters coming together?
Supercluster
What is the approximate time it takes for the Sun to complete one orbit around the galactic center?
225 million years
What is the term for the grouping of stars that forms a recognizable pattern when observed from Earth?
Constellation
What is the distance that light travels in one hour?
Light hour
What is the age of the oldest stars in the globular clusters?
12.5 billion years
What is the shape of the Milky Way galaxy when viewed from the side?
Egg-shaped
What is the term for the round fuzzy blobs above and below the plane of the galaxy disk?
Globular clusters
What is the approximate distance from Earth to the nearest star, Proxima Centauri?
40 trillion kilometers
What is the term for the grouping of stars that forms a recognizable pattern, easily visible from South Africa, even in urban areas?
Southern Cross
What is the approximate distance across the Milky Way galaxy?
950 quadrillion kilometers
What is the term for the units of measurement based on the speed of light, used to measure vast distances in space?
Light-based units
What is the primary reason astronomers use light minutes and light hours to measure distances within the solar system?
Because light travels extremely fast, making it a convenient unit of measurement
What is the approximate distance light travels in one second?
299,792,458 meters
What is the primary reason why the stars in the Milky Way galaxy are visible from Earth?
Because they are part of the same galaxy as our Sun.
What is the term for the vast, empty regions of space with very few galaxies?
Void
What is the characteristic of the stars found in the galactic bulge of the Milky Way?
They are old and cool.
What is the approximate distance from the Earth to the nearest star outside of our solar system, Proxima Centauri?
4.24 light years
How long does it take for light from an object one light hour away to reach Earth?
One hour
What is the shape of the Milky Way galaxy when viewed from a remote location?
A spiral with five major arms.
What is the term for the large-scale structure of the universe, composed of galaxy clusters arranged in a thread-like formation?
Filament
What is the purpose of the term 'galaxy disk' in the context of the Milky Way?
To describe the flattened region of the galaxy containing most of its stars, dust, and gas.
What is the estimated number of galaxies in the Universe?
100 to 200 billion
What is the characteristic of the spiral arms in the Milky Way galaxy?
They contain younger and hotter stars.
What is the movement of the stars in the Milky Way galaxy?
They move in a circular motion around the galaxy's center.
How many times can light travel around the Earth in one second?
7.5 times
What is the distance that light travels in one year?
Nearly 10 trillion kilometers
What is the appearance of the Milky Way galaxy when observed from dark, remote areas?
A hazy band of light stretching across the sky.
Why do astronomers use units based on the speed of light to measure vast distances?
Because light travels extremely fast, making it a convenient unit of measurement
What is the relationship between the Sun and the Milky Way galaxy?
The Sun is a star within the Milky Way galaxy.
What is the shape of the Milky Way Galaxy when observed from above?
Spiral
What is the purpose of the galaxy disk?
To hold gas and dust
What is the characteristic of the stars in the galactic bulge?
Older and cooler
What is the function of spiral arms in the Milky Way Galaxy?
To hold hot young stars and nebulae
What is the apparent appearance of the Milky Way Galaxy from dark, remote areas?
A hazy band of light
What is the motion of the stars in the Milky Way Galaxy?
They revolve around the galaxy's center
What is the characteristic of the dark wisps in the galaxy disk?
They are dust lanes
What is the name given to the Milky Way Galaxy by the Romans?
Via Lactea
What is the approximate distance that the Sun travels to complete one orbit around the galactic center?
950 quadrillion kilometers
What is the shape of the Milky Way galaxy when viewed from the side?
A giant fried egg
What is the term for the grouping of stars that, when observed from Earth, forms a recognizable pattern?
Constellation
What is the approximate age of the oldest stars in the globular clusters?
12.5 billion years
What is the term for the distance that light travels in one minute?
Light minute
What is the approximate distance from Earth to the nearest star, Proxima Centauri?
40 trillion kilometers
What is the term for the dense concentration of stars in the Sagittarius Arm?
Hazy band of light
What is the term for the triple star system consisting of Alpha Centauri A, Alpha Centauri B, and Proxima Centauri?
Alpha Centauri
What is the approximate distance from Earth to the Sun?
150 million kilometers
What is the term for the round fuzzy blobs above and below the plane of the galaxy disk?
Globular cluster
What is the distance that light travels in one hour?
The distance that light travels in one hour
How long does it take light to travel from the Earth to the Moon?
1.3 seconds
What is the approximate distance of the nearest star to our solar system, Proxima Centauri?
40 trillion kilometers
What is the term for the large-scale structure of the universe, composed of galaxy clusters arranged in a thread-like formation?
Filament
How long does it take light from an object one light hour away to reach Earth?
1 hour
What is the approximate distance of one light year?
Nearly 10 trillion kilometers
How many times can light travel around the Earth in one second?
7.5 times
What is the term for the vast, empty regions of space with very few galaxies?
Void
What is the approximate distance from Earth to the Sun?
8 light minutes
How many galaxies are estimated to be in the Universe?
100 to 200 billion
What is the approximate number of stars found in small galaxies?
A few million
What is the shape of elliptical galaxies?
Spherical to elongated
What is the term for a large collection of galaxies?
Galaxy cluster
What is the shape of the Universe on the largest scales?
Sponge-like
What is the term for the vast empty regions between galaxy clusters?
Voids
What is the Local Group part of?
The Virgo Supercluster
What is the approximate age of the Universe?
13.7 billion years
What is the term for a small collection of galaxies bound by gravity?
Galaxy group
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
