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 15 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?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

Did you know?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

Did you know?

The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

Did you know?

There are approximately 3 million unintended pregnancies in the United States each year.

Did you know?

There are more bacteria in your mouth than there are people in the world.

Giant Elliptical Galaxy M87 Giant Elliptical Galaxy M87
In 2008, the U.S. economy suffered a gaping wound as several trillion dollars were ripped out of it. In 2008, the U.S. economy suffered a gaping wound as several trillion dollars were ripped out of it.
Step-Wise Treatment of Asthma in Children > 12 Years of Age and Adults Step-Wise Treatment of Asthma in Children > 12 Years of Age and Adults
In Canada, 2/3 women and over 1/2 of men 55 to 64 years of age are grandparents In Canada, 2/3 women and over 1/2 of men 55 to 64 years of age are grandparents
A portfolio earned -13%, 18%, 5%, 24%, and -5% in five successive years. What was the ... A portfolio earned -13%, 18%, 5%, 24%, and -5% in five successive years. What was the ...
Development of the Dungeness crab (Cancer magister). The crabs live for 8 to 10 years. Development of the Dungeness crab (Cancer magister). The crabs live for 8 to 10 years.
Video: Cavernous Sinus Larynx Middle Ear Orbit: Granulesm Animation

For a complete list of videos, visit our video library