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

Author Question: What is main-sequence fitting? A) a way of forcing stars to fit into a standard main sequence, ... (Read 62 times)

joe

  • Hero Member
  • *****
  • Posts: 627
on: Jul 27, 2018
What is main-sequence fitting?
 
  A) a way of forcing stars to fit into a standard main sequence, even when they have some unusual characteristics
  B) a method for determining the age of a star cluster
  C) a method for determining the distance to a star cluster by assuming that its main sequence should line up with the main sequence on a standard H-R diagram
  D) the way we construct an H-R diagram by plotting the surface temperatures and luminosities of stars

Question 2

The distance to a star with a parallax angle of 0.2 arc seconds is
 
  A) 0.2 parsec. B) 2 parsecs. C) 5 parsecs. D) 12 parsecs. E) 20 parsecs.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Beatricemm

  • Sr. Member
  • ****
  • Posts: 323
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

C


joe

  • Member
  • Posts: 627
Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

CAPTAINAMERICA

  • Member
  • Posts: 325
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

Did you know?

There are 20 feet of blood vessels in each square inch of human skin.

Did you know?

In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

The "Emu in the sky," a constellation defined by dark clouds rather than the stars. The "Emu in the sky," a constellation defined by dark clouds rather than the stars.
RNA base sequence of the trp leader region RNA base sequence of the trp leader region
A blade and assorted plates for a standard grinder A blade and assorted plates for a standard grinder
Separation of main-band (MB) and satellite (S) DNA Separation of main-band (MB) and satellite (S) DNA
Two ways of treating blocked coronary arteries, the main cause of heart attacks in older adults. Two ways of treating blocked coronary arteries, the main cause of heart attacks in older adults.
Main components of the human endocrine system and the effects of their secretions Main components of the human endocrine system and the effects of their secretions
Video: Isovolumetric VC, Ventricular ejection, Isovolumetric & Passive ventricular filling

For a complete list of videos, visit our video library