Space Exploration - Section 10.2 Quiz

Which of the following is not a basic galaxy shape?
1. Linear
2. Elliptical
3. Spiral
4. Irregular
What was so important about the discovery made by Edwin Hubble in 1925?
1. He discovered that there were other galaxies besides the Milky Way
2. He observed planets in other galaxies
3. He discovered that the Milky Way is actually a nebula
4. He discovered that our solar system was much bigger than previously thought
Astronomers estimate that the whole universe contains at least how many galaxies?
1. 125 billion
2. 800 billion
3. 100 trillion
4. 100 quadrillion.
A galaxy shaped like a perfect sphere is an example of
1. an elliptical galaxy.
2. an irregular galaxy.
3. a spiral galaxy.
4. a linear galaxy.
The Milky Way is
1. a spiral galaxy.
2. a nebula.
3. an irregular galaxy.
4. an elliptical galaxy.
Which galaxy type typically contains the oldest stars in the universe?
1. Elliptical
2. Spiral
3. Irregular
4. None, all the types contain the same mix of stars
Which galactic shape is likely to be spinning fastest?
1. A flat disk
2. A round sphere
3. An irregular grouping
4. A disk with a bulge in the centre
Galactic cannibalism refers to
1. a large galaxy pulling a smaller galaxy into its own structure..
2. a galaxy absorbing its own stars into its centre.
3. a galaxy spinning so fast its outermost stars are flying off.
4. stars within a galaxy absorbing other stars..
Which galaxy is closest to the Milky Way?
1. Andromeda
2. Sombrero
3. Cartwheel
4. Magellanic
A ____________ is an interstellar cloud of dust.
1. Nebula
2. Universe
3. Galaxy
4. Supernova