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 104 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
:D TYSM

Jossy

  • Member
  • Posts: 336
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.

Obtaining protein sequence information with tandem MS Obtaining protein sequence information with tandem MS
A signature sequence in the EF-1α/EF-Tu protein family A signature sequence in the EF-1α/EF-Tu protein family
The Pleiades, an open cluster of stars in the constellation of Taurus. These stars share a common mo The Pleiades, an open cluster of stars in the constellation of Taurus. These stars share a common mo
Stars and the Interstellar Medium Stars and the Interstellar Medium
Standard reduction potentials of the major respiratory electron carriers Standard reduction potentials of the major respiratory electron carriers
Human genome sequence explosion Human genome sequence explosion
Video: Introduction to Sickle Cell Anemia

For a complete list of videos, visit our video library