« previous next »

Author Question: Which of the following best describes the Milky Way Galaxy? A) a spiral galaxy with a disk about ... (Read 26 times)

storky111

  • Hero Member
  • *****
  • Posts: 561
on: Jul 27, 2018
Which of the following best describes the Milky Way Galaxy?
 
  A) a spiral galaxy with a disk about 100,000 light-years in diameter and containing between 100 billion and 1 trillion stars
  B) a spherically shaped collection of stars including our solar system and about a dozen other solar systems, stretching about 4 light-years in diameter
  C) a spherically shaped collection of about 1 million stars that is about 100 light-years in diameter
  D) a spiral galaxy with a disk about a billion kilometers in diameter and containing between 100 million and 1 billion stars
  E) a spiral galaxy with a disk about 100,000 light-years in diameter and containing about 100,000 stars

Question 2

The core, mantle, and crust of a planet are defined by differences in their
 
  A) temperature. B) density. C) strength. D) geological activity.


bookworm410

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

Did you know?

Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.

Did you know?

Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

Did you know?

The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

Did you know?

Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

The elliptical galaxy Centaurus A at visible, far-infrared and x-ray wavelengths. The elliptical galaxy Centaurus A at visible, far-infrared and x-ray wavelengths.
Off-Center Disk Off-Center Disk
The Spiral The Spiral
Accretion Disk Around a Supermassive Black Hole Accretion Disk Around a Supermassive Black Hole
Variety in Spiral Arms Variety in Spiral Arms
Giant Elliptical Galaxy M87 Giant Elliptical Galaxy M87
Video: Pasteur's Experiment

For a complete list of videos, visit our video library