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

Author Question: Why was stellar parallax not measured until the 19th century? What will be an ideal ... (Read 31 times)

APUS57

  • Hero Member
  • *****
  • Posts: 571
on: Jul 27, 2018
Why was stellar parallax not measured until the 19th century?
 
  What will be an ideal response?

Question 2

Mars is often called a midway world, similar in some respects to Earth, and in others to our Moon. Explain.
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

leahchrapun

  • Sr. Member
  • ****
  • Posts: 332
Reply #1 on: Jul 27, 2018
Answer to Question 1

Stars are so far away that even the closest stars have parallax less than an arcsecond, which could not be measured without the technological developments that did not occur until the 19th century.

Answer to Question 2

Like our Moon, much of Mars is ancient cratered terrain, and its density is closer to that of the Moon than Earth. But like us, Mars has seasonal variations, polar caps, clouds, an atmosphere, dust storms, and signs of past liquid water and erosion.


APUS57

  • Member
  • Posts: 571
Reply 2 on: Jul 27, 2018
Gracias!

upturnedfurball

  • Member
  • Posts: 334
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

Did you know?

Drug-induced pharmacodynamic effects manifested in older adults include drug-induced renal toxicity, which can be a major factor when these adults are experiencing other kidney problems.

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.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

Charles Darwin may be dead and gone but a recent write-in campaign has pitted him against Republican Charles Darwin may be dead and gone but a recent write-in campaign has pitted him against Republican
Harriet Beecher Stowe’s novel, Uncle Tom’s Cabin, became a staple of the mid-nineteenth-century thea Harriet Beecher Stowe’s novel, Uncle Tom’s Cabin, became a staple of the mid-nineteenth-century thea
The Death of Socrates by Jacques Louis David. The eighteenth-century French painter David portrayed ... The Death of Socrates by Jacques Louis David. The eighteenth-century French painter David portrayed ...
Diagram of a section of a 15th-century oil painting Diagram of a section of a 15th-century oil painting
Economics Today: The Micro View, 19th Edition Economics Today: The Micro View, 19th Edition
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 ...
Video: Calvin cycle (The light-independent reactions )

For a complete list of videos, visit our video library