« previous next »

Author Question: Which was a contribution to astronomy made by Copernicus? A) The planets move around the Sun in ... (Read 43 times)

Wadzanai

  • Hero Member
  • *****
  • Posts: 528
on: Jul 27, 2018
Which was a contribution to astronomy made by Copernicus?
 
  A) The planets move around the Sun in elliptical orbits.
  B) His theory of gravity accounted for the variable speeds of the planets.
  C) He laid out the order and relative motion of the known solar system.
  D) He discovered the Sun was not at the center of the Milky Way.
  E) His telescope revealed the four moons of Jupiter, a model solar system.

Question 2

What is the absolute magnitude of our Sun?
 
  A) -23.0
  B) -4.6
  C) -1.4
  D) +4.8
  E) +9.4


Swizqar

  • Sr. Member
  • ****
  • Posts: 357
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Did you know?

Automated pill dispensing systems have alarms to alert patients when the correct dosing time has arrived. Most systems work with many varieties of medications, so patients who are taking a variety of drugs can still be in control of their dose regimen.

Did you know?

The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

Location of the Planets Relative to the Sun Location of the Planets Relative to the Sun
In 1839 Mary Cragin, at the age of twenty-nine, became a convert to John Humphrey Noyes’s “communism In 1839 Mary Cragin, at the age of twenty-nine, became a convert to John Humphrey Noyes’s “communism
Commercially made peanut butter doesn’t have any detectable levels of trans fatty acids Commercially made peanut butter doesn’t have any detectable levels of trans fatty acids
Birth of Modern Astronomy Birth of Modern Astronomy
Orbital Motion of Earth and Other Planets Orbital Motion of Earth and Other Planets
Orbits of the Planets Orbits of the Planets
Video: Spermatogenesis Animation

For a complete list of videos, visit our video library