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

Author Question: Explain why it is so difficult to see planets around other stars. What will be an ideal ... (Read 23 times)

jho37

  • Hero Member
  • *****
  • Posts: 531
on: Jul 27, 2018
Explain why it is so difficult to see planets around other stars.
 
  What will be an ideal response?

Question 2

From where did the molecular oxygen in Earth's atmosphere originate?
 
  A) photosynthesis from plant life
  B) photosynthesis from single-celled organisms
  C) outgassing from volcanoes
  D) atmospheric bombardment
  E) oxidation of surface rocks


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jjorrostieta

  • Sr. Member
  • ****
  • Posts: 298
Reply #1 on: Jul 27, 2018
Answer to Question 1

Planets are very faint compared to the stars they orbit. Moreover, they are very close to their parent star compared to the distance between stars. On the 1-to-10 billion scale, where the Sun is the size of a grapefruit and Earth is a pinhead about 15 meters way, the nearest star is several thousand kilometers away. Together, this makes it extremely difficult to distinguish the faint light of a planet from the star it orbits. (Nevertheless, massive Jupiter-like planets have been indirectly detected orbiting around nearby stars.)

Answer to Question 2

B


jho37

  • Hero Member
  • *****
  • Posts: 531
Reply #2 on: Jul 27, 2018
Thank you!


jjorrostieta

  • Sr. Member
  • ****
  • Posts: 298
Reply #3 on: Jul 27, 2018
Always glad to help...


« previous next »
 

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

The Inner Planets: A Comparison The Inner Planets: A Comparison
The Magnetic Fields of Five Planets The Magnetic Fields of Five Planets
Classifying the Spectra of Stars Classifying the Spectra of Stars
Post–Main-Sequence Evolution of Low-Mass Stars Post–Main-Sequence Evolution of Low-Mass Stars
Cultures Ideal Body Types Cultures Ideal Body Types
Evolutionary Stages of Stars Evolutionary Stages of Stars
Video: How Hemoglobin Picks Up and Delivers Oxygen

For a complete list of videos, visit our video library