ASTRONOMY (The galaxy)

1.      It is a galaxy appear as flat, blue-white disks of stars, gas and dust with yellowish bulges in their centers

• Moon

• Spiral

• Constellations

What is the age of the Milky Way

• 14.9 Billion Years

• 11.5 Billion Years

• 13.6 Billion Years

At the center of the milky way sits a supermassive black hole called

• Sagittarius

• Perseus

• Nebula

  In what year does Hubble study the Andromeda Nebula?

• 1953

• 1973

• 1923

  It’s called a ________ because if you could view it from the top or bottom, it would look like a spinning pinwheel.

• Irregular

• Spiral Galaxy

• Elliptical

A large collection of stars, dust, and gas in space. A system of millions or billions of stars held together by gravity.      

• Constellations

• Galaxy

• Andromeda Galaxy

Elliptical are preferentially found close to the centers of galaxy clusters. It ranges in size from tens of millions to over one hundred trillion stars.

• True

• False

He is a Dutch astronomer, sometimes dubbed the master of the galactic system, was the first to realize that the Milky Way isn't motionless but rotates, and he calculated speeds at which stars at various distances orbit around the galactic center.

• Hubble

• Jon Oort

• Charles Messier

Are stars whose brightness changes periodically over time, and they had been discovered by the American astronomer, Henrietta Leavitt, in the early 1900ʼs.

• RR Lyraes

• RS Pupis

• Cepheids

Which of the following is a characteristic of spiral galaxy/galaxies?

• Appears as blue-white disks of stars

• Galaxies that are abundant in the early universe

• They possess little gas and dust, contain older stars and not actively forming stars anymore