« previous next »

Author Question: Which characteristic is not generally true of a starburst galaxy? A) The observed features that ... (Read 51 times)

cookcarl

  • Hero Member
  • *****
  • Posts: 539
on: Jul 27, 2018
Which characteristic is not generally true of a starburst galaxy?
 
  A) The observed features that cause us to classify it as a starburst must be only temporary phenomena in the galaxy's history.
  B) The observed features of the starburst are thought to be caused by the presence of a supermassive black hole in the galaxy's center.
  C) Supernovae occur so frequently that their effects combine to drive a galactic wind that blows material into intergalactic space.
  D) Its rate of star formation is many times higher than the rate of star formation in the Milky Way.

Question 2

The apparent magnitude of the Sun is -26, while Sirius has an apparent magnitude of -1. How much brighter does the Sun appear than Sirius?
 
  What will be an ideal response?


nathang24

  • Sr. Member
  • ****
  • Posts: 314
Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

This is a difference of 25 magnitudes. As each 5 magnitudes is a brightness factor of 100 times, then 100 to the fifth power is 10 billion times brighter.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

Did you know?

Though “Krazy Glue” or “Super Glue” has the ability to seal small wounds, it is not recommended for this purpose since it contains many substances that should not enter the body through the skin, and may be harmful.

Did you know?

As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

Did you know?

All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

History of the number of observed sunspots during the last 250 years, which shows the ~11-year solar History of the number of observed sunspots during the last 250 years, which shows the ~11-year solar
Malignant melanoma. This photograph demonstrates the highly characteristic color of this tumor. Malignant melanoma. This photograph demonstrates the highly characteristic color of this tumor.
The declining age of menarche over the past 150 years has been measured in many European countries, The declining age of menarche over the past 150 years has been measured in many European countries,
Which is TRUE about the alternation of generations cycle that is diagramed above? Which is TRUE about the alternation of generations cycle that is diagramed above?
Symbolic interactionists stress that a basic characteristic of humans is that they attach meaning to ... Symbolic interactionists stress that a basic characteristic of humans is that they attach meaning to ...
The major internal features of a neuron. The major internal features of a neuron.
Video: Chronology of leptin research (A history of leptin research)

For a complete list of videos, visit our video library