The Milky Way Galaxy Quiz

By: Staff
Image: refer to hsw

About This Quiz

Do you have more than a passing interest in the night sky? Channel your aspiring inner astronomer and see if you can ace this quiz on the Milky Way.

Which galaxy is home to Earth?

The Milky Way galaxy is home to Earth.

What is the shape of the Milky Way galaxy?

The Milky Way is a spiral-shaped galaxy. More than two-thirds of the known galaxies are spiral-shaped.

In which arm of the Milky Way galaxy is the Earth located?

The Earth is located in the Orion-Cygnus arm of the Milky Way galaxy.

True or false: Alpha Centauri is the nearest major galaxy to the Milky Way.

The Andromeda galaxy is the nearest major galaxy to the Milky Way. At 2.3 million light-years away, the Andromeda galaxy is the most distant thing that can be seen with the naked eye. Alpha Centauri is the closest star system to our solar system within the Milky Way.

How many stars are estimated to be in the Milky Way galaxy?

There are an estimated 100 billion to 400 billion stars in the Milky Way.

What makes up most of the mass of the Milky Way galaxy?

Dark matter is estimated to constitute up to 90 percent of the mass of the Milky Way galaxy.

What is the diameter of the Milky Way galaxy in light-years?

The Milky Way galaxy has the approximate diameter of 100,000 light-years.

What do scientists believe is at the center of the Milky Way galaxy?

Scientists believe that a massive black hole is at the center of the Milky Way galaxy. Astronomers also believe that black holes form the center of most galaxies in the universe.

What is the massive black hole in the center of the Milky Way named?

Very little light radiates from the area around Sagittarius A.

Which astronomer developed the grindstone model of the Milky Way galaxy?

William Herschel and his sister Caroline Herschel developed the grindstone model of the Milky Way galaxy.

Most of the view of the galactic center of the Milky Way is obscured by what?

Dust and gas is thick between the stars.

What is the name of the area through which the galactic center of the Milky Way can be observed?

Baade's window is one of six such anomalies and is named after the German-American astrophysicist Walter Baade.

Which astronomer discovered that the sun was not at the center of the Milky Way galaxy?

Shapely also discovered that galaxies tend to occur in clusters.

Which constellation is the center of the Milky Way Galaxy found in, when viewed from Earth?

When viewed from Earth, the center of the Milky Way galaxy is found within the constellation Sagittarius.

How far from the center of the Milky Way galaxy is Earth?

Earth is about 25,000 light-years from the center of the Milky Way galaxy. Earth also is roughly 25,000 light-years from the outer rim of the Milky Way galaxy.

True or false: The stellar systems within the galaxy are moving, but the Milky Way galaxy is stationary.

The Milky Way galaxy is constantly rotating along with all the stellar systems within the galaxy.

How long does it take for Earth's solar system to orbit the Milky Way galaxy?

Our solar system orbits the Milky Way galaxy approximately once every 250 million years.

Which component of the Milky Way galaxy contains most of the gas and dust?

The galactic disk is 100,000 light-years across.

Which part of the Milky Way galaxy contains the highest density of stars?

The nuclear bulge is about 10,000 light-years across.

What is the name of the collection of galaxies that the Milky Way is part of?

The Magellanic Clouds are also in the Local Group.

How many galaxies make up the Local Group?

More than 30 galaxies make up the Local Group. The Local Group is spread over a diameter of roughly 10 million light-years.

How is a group of stars, star clusters, gas, dust and dark matter bound together?

A galaxy is defined as a group of stars, star clusters, gas, dust and dark matter all bound together by gravity.

Which ancient people are responsible for first naming the Milky Way galaxy?

The Greeks originally called our galaxy "<i>Galaxias Kyklos</i>," which translates to "milky circle." The Romans later adapted the name to the Latin "<i>Via Lactea,</i>" which translates to "Road of Milk."

Where in the Milky Way galaxy are globular clusters found?

The globular clusters are found in the halo of the Milky Way galaxy. There are approximately 100 globular clusters in the galaxy made up of stars that may be up to 15 billion years old.

What is the orbital speed of our solar system within the Milky Way galaxy?

The orbital speed of our solar system within the Milky Way galaxy is 220 kilometers per second.

Which part of the Milky Way galaxy contains the youngest stars?

The stars are concentrated in the spiral arms of the disk.

The Milky Way is part of the Local Group, but which supercluster is the Local Group part of?

The Virgo Supercluster of galaxies is between 100 and 200 million light-years in diameter.

Which Greek philosopher first suggested that the Milky Way contained distant stars?

Democritus helped develop the atomic theory of the universe, too.

True or false: In 1610, Galileo proved the Milky Way was composed of a large number of faint stars.

In 1610, Galileo used a telescope to prove that the Milky Way was made of numerous faint stars.

How many solar systems have been found in the Milky Way galaxy?

More than 500 solar systems have been found in the Milky Way galaxy. There are at least 100 billion stars in the galaxy.

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