Concept explainers
Whether the statement is true or false.
Answer to Problem 1QAP
True
Explanation of Solution
The galaxies can be classified into so many ways like elliptical, spiral, irregular etc. Each and every galaxy has own spin and orientation. Galaxies having elliptical shape are known as elliptical galaxies and galaxies having spiral shape are spiral galaxies.
The galaxies which are not well organised in a particular manner, they are known as irregular galaxies. The galaxies have their own orientations so it is difficult to judge the type of galaxy by the orientation only.
Take an example of orientation of a coin. When a coin is thrown into the air it can be seen from different angles; the same is with the galaxies. When three dimensional pictures of galaxies from different angles are observed, the shape of galaxies looks different.
Conclusion:
Thus, the classification of galaxy does not only depend on the orientation of galaxies so sometimes it is difficult to classify them. Hence the statement is true.
Want to see more full solutions like this?
Chapter 14 Solutions
UNDERSTAND. OUR UNIVER-W/SMARTWORK5+EBK
- When comparing two isolated spiral galaxies that have the same apparent brightness, but rotate at different rates, what can you say about their relative luminosity?arrow_forwardA cluster of galaxies is observed to have a recessional velocity of 60,000 km/s. Find the distance to the cluster. (Assume a Hubble constant of 22 km/s per million light-years.)arrow_forwardDescribe how you might use the color of a galaxy to determine something about what kinds of stars it contains.arrow_forward
- Stars and Galaxies (MindTap Course List)PhysicsISBN:9781337399944Author:Michael A. SeedsPublisher:Cengage LearningFoundations of Astronomy (MindTap Course List)PhysicsISBN:9781337399920Author:Michael A. Seeds, Dana BackmanPublisher:Cengage LearningAstronomyPhysicsISBN:9781938168284Author:Andrew Fraknoi; David Morrison; Sidney C. WolffPublisher:OpenStax
- Stars and GalaxiesPhysicsISBN:9781305120785Author:Michael A. Seeds, Dana BackmanPublisher:Cengage Learning