« previous next »

Author Question: What types of observations are necessary to determine the absolute luminosity of a star? What ... (Read 42 times)

iveyjurea

  • Hero Member
  • *****
  • Posts: 555
on: Jul 27, 2018
What types of observations are necessary to determine the absolute luminosity of a star?
 
  What will be an ideal response?

Question 2

The Sun's mass and volume are over a million times that of our Earth.
 
  Indicate whether the statement is true or false


gstein359

  • Sr. Member
  • ****
  • Posts: 293
Reply #1 on: Jul 27, 2018
Answer to Question 1

The absolute luminosity of a star, or absolute magnitude, is determined from the apparent magnitude and distance. The apparent magnitude is rather easily measured using a telescope and a photometer. The distance can be much harder to determine. If the star is nearby then its parallax can be measured. If more distant, some other method will have to be used, such as spectroscopic parallax. Spectroscopic parallax will give the absolute magnitude of the star without having to compute distance.

Answer to Question 2

FALSE


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Did you know?

The human body produces and destroys 15 million blood cells every second.

Did you know?

The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Types of Neurons Types of Neurons
The Types of Functions of the T Cells The Types of Functions of the T Cells
Types of catheters: Indwelling (Foley) catheter. Types of catheters: Indwelling (Foley) catheter.
Blood types and results of donor and recipient combinations. Blood types and results of donor and recipient combinations.
Knoop’s experiments to determine the b-oxidation of fatty acids Knoop’s experiments to determine the b-oxidation of fatty acids
ABO blood types pedigree ABO blood types pedigree
Video: Introduction to Photolithography - WC, BLF, PA, Hard and Soft baking

For a complete list of videos, visit our video library