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

Author Question: How did Herschel try to map our Galaxy 200 years ago, and why did he fail? What will be an ideal ... (Read 61 times)

humphriesbr@me.com

  • Hero Member
  • *****
  • Posts: 550
on: Jul 27, 2018
How did Herschel try to map our Galaxy 200 years ago, and why did he fail?
 
  What will be an ideal response?

Question 2

The first successful landers on the surface of Mars were:
 
  A) Mariners 4 and 5 in 1965.
  B) Vikings 1 and 2 in 1976.
  C) Voyagers 1 and 2 in 1979.
  D) Pathfinder and Sojourner in 1997.
  E) Spirit and Opportunity in 2004.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

orangecrush

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

His star counts revealed the galactic disk, but the dark nebulae of dust blocked everything except the closer spiral arms, making him think we lay near the center.

Answer to Question 2

B


humphriesbr@me.com

  • Hero Member
  • *****
  • Posts: 550
Reply #2 on: Jul 27, 2018
Thanks


orangecrush

  • Sr. Member
  • ****
  • Posts: 350
Reply #3 on: Jul 27, 2018
Welcome :)


« previous next »
 

Did you know?

More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Did you know?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

Did you know?

Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

Dynamics of a Grand-Design Spiral Galaxy Dynamics of a Grand-Design Spiral Galaxy
(a) The site of Zhoukoudian outside of Beijing, China, spans several hundred thousand years and (b) (a) The site of Zhoukoudian outside of Beijing, China, spans several hundred thousand years and (b)
Growth of the body and brain is dramatic over the first 2 years. Growth of the body and brain is dramatic over the first 2 years.
The age-related increase in spirituality is different for two cohorts born seven years apart. The ... The age-related increase in spirituality is different for two cohorts born seven years apart. The ...
Under ideal conditions, a single cell of the bacterium E. coli would divide every 20 minutes to ... Under ideal conditions, a single cell of the bacterium E. coli would divide every 20 minutes to ...
Heart drawing by 6 years old Heart drawing by 6 years old
Video: Gastroesophageal Reflux Disease (GERD)

For a complete list of videos, visit our video library