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 105 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
Wow, this really help

Sarahjh

  • Member
  • Posts: 370
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

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?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Did you know?

GI conditions that will keep you out of the U.S. armed services include ulcers, varices, fistulas, esophagitis, gastritis, congenital abnormalities, inflammatory bowel disease, enteritis, colitis, proctitis, duodenal diverticula, malabsorption syndromes, hepatitis, cirrhosis, cysts, abscesses, pancreatitis, polyps, certain hemorrhoids, splenomegaly, hernias, recent abdominal surgery, GI bypass or stomach stapling, and artificial GI openings.

Did you know?

The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

Shooting star Shooting star
A Star with Three Planets A Star with Three Planets
Performing Venipuncture Using the Vacutainer Method Performing Venipuncture Using the Vacutainer Method
Frans de Waal Observing Chimpanzees Frans de Waal Observing Chimpanzees
Derivative using delta method Derivative using delta method
Brittle Star Brittle Star
Video: Spermatogenesis Animation

For a complete list of videos, visit our video library