« previous next »

Author Question: To explain retrograde motion as well as changes in planetary brightness, Ptolemy's model used ... (Read 32 times)

storky111

  • Hero Member
  • *****
  • Posts: 561
on: Jul 27, 2018
To explain retrograde motion as well as changes in planetary brightness, Ptolemy's model used ________.
 
  Fill in the blank(s) with correct word

Question 2

Based on its orbit, give two reasons to revoke Pluto's planetary status.
 
  What will be an ideal response?


jasonq

  • Sr. Member
  • ****
  • Posts: 335
Reply #1 on: Jul 27, 2018
Answer to Question 1

epicycles

Answer to Question 2

It does not orbit in the ecliptic, but off by 17 degrees. It also has a more eccentric orbit than even Mercury or Mars, and can cut inside of the orbit of Neptune between 1979 and 1999 at perihelion.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

Did you know?

Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

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?

When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

A model genetic system, the fern Ceratopteris richardii A model genetic system, the fern Ceratopteris richardii
Range of Motion of the Ankle and Foot, Eversion and Inversion Range of Motion of the Ankle and Foot, Eversion and Inversion
Circumduction Circumduction–Moving a body part in a circular motion. Circumduction Circumduction–Moving a body part in a circular motion.
Retrograde and anterograde amnesia Retrograde and anterograde amnesia
A model for mixed inhibition A model for mixed inhibition
Steady State in the Two-Country Model Steady State in the Two-Country Model
Video: Bone Growth and Remodeling

For a complete list of videos, visit our video library