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

Author Question: How can close analysis of the spectra of quasars let us map the whole universe? What will be an ... (Read 41 times)

luvbio

  • Hero Member
  • *****
  • Posts: 623
on: Jul 27, 2018
How can close analysis of the spectra of quasars let us map the whole universe?
 
  What will be an ideal response?

Question 2

Compared to a type A0 star, a type A9 star is
 
  A) bluer.
  B) more massive.
  C) cooler.
  D) hotter.
  E) more luminous.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

samiel-sayed

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Jul 27, 2018
Answer to Question 1

In addition to the emission lines made by the quasar, absorption lines reveal gas clouds that lie between us and the quasar. The closer clouds show smaller redshifts, so their distances and structures can also be mapped.

Answer to Question 2

C


luvbio

  • Member
  • Posts: 623
Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

nguyenhoanhat

  • Member
  • Posts: 332
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

There are approximately 3 million unintended pregnancies in the United States each year.

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

Close-up of the underside of a gecko's foot as it walks on vertical glass Close-up of the underside of a gecko's foot as it walks on vertical glass
Electroencephalography (EEG). To perform the EEG, electrodes attached to the patient’s head pick up Electroencephalography (EEG). To perform the EEG, electrodes attached to the patient’s head pick up
Stellar Size and Spectra Stellar Size and Spectra
STR DNA Analysis Technique STR DNA Analysis Technique
To cleanse an open wound, begin close to the wound and work outward in full or half circles. To cleanse an open wound, begin close to the wound and work outward in full or half circles.
Swot analysis Swot analysis
Video: Mechanisms of capillary exchange (transcytosis & bulk flow)

For a complete list of videos, visit our video library