This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: What does the equivalent of an H-R diagram for galaxies, plotting luminosity versus color, show? ... (Read 57 times)

genevieve1028

  • Hero Member
  • *****
  • Posts: 601
on: Jul 27, 2018
What does the equivalent of an H-R diagram for galaxies, plotting luminosity versus color, show?
 
  A) galaxies fill the diagram showing that there is no correlation between luminosity and color
  B) two clumps, one blue with relatively low luminosity, one red with relatively high luminosity, and a valley in between with few galaxies
  C) a continuum from faint, blue galaxies to bright, red galaxies
  D) a continuum from faint, red galaxies to bright, blue galaxies
  E) a main sequence, just as for stars

Question 2

The spiral structure of the Milky Way is best revealed by ________ cm radio observations of hydrogen atoms.
 
  Fill in the blank(s) with correct word


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

akudia

  • Sr. Member
  • ****
  • Posts: 347
Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

21


genevieve1028

  • Hero Member
  • *****
  • Posts: 601
Reply #2 on: Jul 27, 2018
Thank you!


akudia

  • Sr. Member
  • ****
  • Posts: 347
Reply #3 on: Jul 27, 2018
Always glad to help...


« previous next »
 

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

Did you know?

The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

Did you know?

According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Did you know?

Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

Normal artery versus plaque formation Normal artery versus plaque formation
Soil Texture Diagram Soil Texture Diagram
Validity versus Reliability Validity versus Reliability
Labeled diagram and flowchart of the three muscle tissue types. Labeled diagram and flowchart of the three muscle tissue types.
OraQuick. A negative result would show a red line at the "C" mark, whereas a positive ... OraQuick. A negative result would show a red line at the "C" mark, whereas a positive ...
Diagram illustrates how the dimensions of masculinity and femininity Diagram illustrates how the dimensions of masculinity and femininity
Video: Electromagnetic Spectrum, Chlorophyll and Pigment & Light

For a complete list of videos, visit our video library