Group E (THE GALAXIES)

A _____ is a group of many stars, with gas, dust, and dark matter

• Galaxy

• Galaxies

• Milky Way

• Universe

2.______ holds galaxies together against the general expansion of the universe

• Galaxy

• Gravity

• Universe

• Milky Way

3.The stars are too closely packed to get an accurate count, but it certainly has more stars than some of the ___ galaxies.

• Bigger

• Greater

• Smaller

• Lesser

4. It is a cloud of gas and dust from which bodies in space are formed.

• Sunspot

• Solar flare

• Photosphere

• Nebula

5. Whose astronomer able to resolve individual stars in several of the brighter spiral-shaped nebulae including M31?

• Harlow Shapley

• Galileo Galilei

• Edwin Hubble

• Immanuel Kant

6. What is the most distant object in the sky that the human eye can see without optical instruments?

• The Aurora Borealis

• The Andromeda Galaxy

• The Horsehead Nebula

• The Sagittarius Constellation

7. How was Hubble able to determine the distances of nearby galaxies?

• by observing Cepheid variables in them

• by using radar

• by measuring trigonometric parallaxes

• by measuring the typical angular separations of stars in them

8. Who was the first astronomer to realize that the Milky way galaxy isn't motionless but rotates, and he calculated speeds at which stars at at various distances orbit around the galactic corner?

• Neil Armstrong

• Jan Oort

• Galileo Galilei

• Edwin Hubble

9.With a mass equal to that of four million suns, the ________, discovered in 1974, can be observed in the sky with radio telescopes close to the constellation Sagittarius. 

• Sun

• Earth

• Milky way galaxy

• Blackhole

 

10. What is the supermassive blackhole at the center of Milky Way Galaxy?

• A. Sagittarius A*

• B. Saggitarius A*

• C. Sagitarrius A*

• D. Sagitarius A