« previous next »

Author Question: Process of Science: Describe how scientists measure the distances to galaxies, starting with how ... (Read 29 times)

jon_i

  • Hero Member
  • *****
  • Posts: 549
on: Jul 27, 2018
Process of Science: Describe how scientists measure the distances to galaxies, starting with how they measure the distances of the nearest stars.
 
  Be sure to include enough detail so that someone who does not know the jargon of astronomy can still understand your explanation.

Question 2

How old is the Galaxy? How do we know this?
 
  What will be an ideal response?


Jayson

  • Sr. Member
  • ****
  • Posts: 350
Reply #1 on: Jul 27, 2018
Answer to Question 1

They use parallax to get the distance to nearby stars and then use standard candles to measure farther distances.

Answer to Question 2

The H-R diagrams of the globular clusters in the halo suggest they are 10-12 billion years old; their spherical distribution suggests they formed very early, before rotation had flattened the rest of the Galaxy out into a disk.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

Did you know?

In 1844, Charles Goodyear obtained the first patent for a rubber condom.

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

Using a sphygmomanometer to measure blood pressure. Using a sphygmomanometer to measure blood pressure.
Spiral Galaxies (Nearly Face-on Views) Spiral Galaxies (Nearly Face-on Views)
Typical hookup of a starting and charging tester. Typical hookup of a starting and charging tester.
Three Phases of the Tissue/Wound Repair Process. Three Phases of the Tissue/Wound Repair Process.
Basic process of metabolic profiling Basic process of metabolic profiling
The overall process of splicing The overall process of splicing
Video: Transferring genes into plants Animation

For a complete list of videos, visit our video library