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

Author Question: Which best describes the transit method? a. observing changes in the brightness of the star when ... (Read 102 times)

HCHenry

  • Hero Member
  • *****
  • Posts: 591
on: Jul 27, 2018
Which best describes the transit method?
 
  a. observing changes in the brightness of the star when the orbiting planet crosses in front of the star
 b. observing the magnification of a distant star's brightness by gravitational lensing when an extrasolar planet passes precisely between Earth and a background star
  c. observing the back-and-forth motion that can be measured from Doppler shifts in a star's spectrum
 d. observing the intensity of brightness from a newborn distant star
 e. observing the magnification of a distant planet when it passes closely to our Solar System

Question 2

Explain why the current spectral classification letters are all jumbled and not in alphabetical order.
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

macmac

  • Sr. Member
  • ****
  • Posts: 343
Reply #1 on: Jul 27, 2018
Answer to Question 1

a

Answer to Question 2

The spectral classification sequence originated with the amount of hydrogen in the star's spectrum and was labeled A through Q. However, after plotting that information, it was noticed that there was no pattern to the graph. When they used temperature instead of the hydrogen line, the graph made sense, and has been adopted since then.


HCHenry

  • Member
  • Posts: 591
Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

dawsa925

  • Member
  • Posts: 326
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.

Did you know?

Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

Did you know?

Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

A method to measure the lateral movement of membrane proteins. A method to measure the lateral movement of membrane proteins.
The Scientific Method The Scientific Method
Participant observation, participating and observing in a research setting, is usually supplemented ... Participant observation, participating and observing in a research setting, is usually supplemented ...
Performing Venipuncture Using the Vacutainer Method Performing Venipuncture Using the Vacutainer Method
Performing Venipuncture Using the Vacutainer Method Performing Venipuncture Using the Vacutainer Method
The forked-line method for determining gamete genotype frequency The forked-line method for determining gamete genotype frequency
Video: Mechanisms for chromosome movement Animation

For a complete list of videos, visit our video library