Types of Galaxies

Q.

What is mean by nebula

Q. Which of the following is wrong about the $\text{Andromeda}$ galaxy?

1. It is an irregular galaxy.
2. Our solar system is located in it.
3. It is the closest galaxy to $\text{Milky Way}$.
4. It is also known as $\text{M31}$.

Q. Among the following who gave the famous classification scheme of galaxies based on their size, shape and brightness?

1. Albert Einstein
2. Edwin Hubble
3. Stephen Hawking
4. Galileo Galilei

Q. The large grouping of stars, dust and gas held together by gravity are called:

1. Galaxies
2. Pulse
3. Nebulae
4. Comets

Q. Match the type of galaxy with its name:

1. Spiral Galaxy
2. Irregular galaxy
3. Elliptical galaxy

Q. There are various types of galaxies in the Universe. Analyse the pictures in the options given below and identify which of the images is of the "Barred Spiral" type galaxy?

1. 
2. 
3. 
4. 

Q. What are the 3 types of galaxies? [ 3 marks]

Q. Relative to the center of our galaxy:

1. its starts are stationary
2. its stars move entirely at random
3. its stars revolve
4. Population I starts are stationary and Population II star revolve

Q. Label the parts of milky way galaxy.

1. Bulge
2. Halo
3. Spiral arm

Q. Evidence of various kinds suggests that at the center of our galaxy is a:

1. quasar
2. pulsar
3. neutron star
4. black hole

Q. Who observed galaxies moving away from us?

1. Georges Lemaitre
2. Arno Penzias
3. Edwin Hubble
4. Robert Wilson

Q.

how are galaxis formed?

Q. A galaxy that is moving toward the Earth will show:

1. a red shift in the spectrum
2. an increase in light years
3. a decrease in brightness
4. a blue shift in the spectrum

Q. In which of the following statements the word light year is used correctly?

1. Light travels with the speed of $1$ light year in the Universe
2. The next complete solar eclipse will be seen after $32$ light year
3. The Earth takes $365$ days to complete the distance of $1$ light year around the Sun.
4. Cetus dwarf galaxy is $2.46$ million light year away from us

Q. Using Hubble’s law, find the wavelength of the $590-nm$ sodium line emitted from galaxies

Q. The red shift in the spectral lines of light reaching us from other galaxies implies that these galaxies:

1. are moving closer to one another
2. are moving farther apart from one another
3. consist predominantly of red giant stars
4. are in rapid rotation

Q. Which of the following are the properties of an elliptical galaxy?

1. Sprial arms.
2. Larger and older compared to the spiral galaxies.
3. More stars.
4. Devoid of sprial arms.