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

Author Question: The Milky Way Galaxy's galaxy type is SBb. Indicate whether the statement is true or ... (Read 68 times)

notis

  • Hero Member
  • *****
  • Posts: 596
on: Jul 27, 2018
The Milky Way Galaxy's galaxy type is SBb.
 
  Indicate whether the statement is true or false

Question 2

If we detected an Earth-like planet in the habitable zone around another star, describe how we might learn whether it contained life.
 
  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

lauravaras

  • Sr. Member
  • ****
  • Posts: 347
Reply #1 on: Jul 27, 2018
Answer to Question 1

TRUE

Answer to Question 2

Future technology (large space-based interferometers) will be able to measure the far-infrared spectrum of the planet's atmosphere. Ozone produces a strong feature in the Earth's atmosphere and would be detectable in the hypothetical extrasolar planet with the planned space interferometer. Ozone is related to oxygen, which is highly reactive, and would rapidly disappear (through oxidation) from the atmosphere were it not being constantly replenished. Converting oxides back to oxygen requires energy and is not a chemical reaction that would spontaneously occur otherwise. In the Earth's case, the energy comes from the sun via photosynthesis in plants and the detection of ozone near another planet would therefore be a strong indicator of life.


notis

  • Member
  • Posts: 596
Reply 2 on: Jul 27, 2018
Excellent

nothere

  • Member
  • Posts: 324
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

There are 60,000 miles of blood vessels in every adult human.

Did you know?

The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.

Did you know?

GI conditions that will keep you out of the U.S. armed services include ulcers, varices, fistulas, esophagitis, gastritis, congenital abnormalities, inflammatory bowel disease, enteritis, colitis, proctitis, duodenal diverticula, malabsorption syndromes, hepatitis, cirrhosis, cysts, abscesses, pancreatitis, polyps, certain hemorrhoids, splenomegaly, hernias, recent abdominal surgery, GI bypass or stomach stapling, and artificial GI openings.

Did you know?

Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

Did you know?

Human kidneys will clean about 1 million gallons of blood in an average lifetime.

Spitzer Telescope Picture of a galaxy Spitzer Telescope Picture of a galaxy
True Friendship True Friendship
Effect of stimulus type on graded potentials. Effect of stimulus type on graded potentials.
Connections of a nitric acid plant, intermediate pressure type Connections of a nitric acid plant, intermediate pressure type
Action of type I and type II topoisomerases, as shown by gel electrophoresis Action of type I and type II topoisomerases, as shown by gel electrophoresis
Chloroplast segregation determined by mating type in Chlamydomonas Chloroplast segregation determined by mating type in Chlamydomonas
Video: hGH (protein synthesis, growth and development)

For a complete list of videos, visit our video library