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

Author Question: Why is the Hyades Cluster important for building up a catalog of the true luminosities of ... (Read 12 times)

yoooooman

  • Hero Member
  • *****
  • Posts: 557
on: Jul 27, 2018
Why is the Hyades Cluster important for building up a catalog of the true luminosities of main-sequence stars?
 
  A) It is close enough to us that the distance to its stars can be found by stellar parallax.
  B) It's a cluster that has been photographed over many decades, so we know how the stars vary in brightness.
  C) It contains many Cepheid variable stars that can be used to determine its distance.
  D) It is an extremely bright star cluster.
  E) It is an old globular cluster whose age we can determine very accurately by measuring its main-sequence turn-off point.

Question 2

Galileo is credited with designing the first reflector telescope.
 
  Indicate whether the statement is true or false


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

meganlapinski

  • Sr. Member
  • ****
  • Posts: 333
Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

FALSE


yoooooman

  • Member
  • Posts: 557
Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

peter

  • Member
  • Posts: 330
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

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.

Sharing patient information with colleagues is an important nursing role Sharing patient information with colleagues is an important nursing role
The world has been horrified recently at a U.S. Congress so polarized and paralyzed that it cannot p The world has been horrified recently at a U.S. Congress so polarized and paralyzed that it cannot p
Louis H. Sullivan, Bayard-Condict Building (detail), New York. Louis H. Sullivan, Bayard-Condict Building (detail), New York.
It is important that parents repeat safety rules to preschoolers and monitor compliance with rules. It is important that parents repeat safety rules to preschoolers and monitor compliance with rules.
Hydrolysis reactions for some biochemically important phosphate compounds (part 3) Hydrolysis reactions for some biochemically important phosphate compounds (part 3)
Proteins play an important role in keeping your skin healthy and your nails strong Proteins play an important role in keeping your skin healthy and your nails strong
Video: Epidural Hematoma

For a complete list of videos, visit our video library