« previous next »

Author Question: Binary (double) stars can be detected by a. being seen as two separate stars with a telescope. ... (Read 79 times)

ereecah

  • Hero Member
  • *****
  • Posts: 530
on: Jul 27, 2018
Binary (double) stars can be detected by
 
  a. being seen as two separate stars with a telescope.
  b. one star traveling a wiggly proper-motion path across the sky.
  c. one star dimming abruptly as another passes in front of it.
  d. pairs of absorption lines seen in the spectrum of what appears to be one star.
  e. All of the other choices are correct.

Question 2

Which blurs our Earth-based view of celestial objects?
 
  a. the Sun
  b. the Moon
  c. Earth's atmosphere


kishoreddi

  • Sr. Member
  • ****
  • Posts: 329
    • Your online Help in Biology and chemistry
Reply #1 on: Jul 27, 2018
Answer to Question 1

e

Answer to Question 2

c


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

ereecah

  • Hero Member
  • *****
  • Posts: 530
Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


kishoreddi

  • Sr. Member
  • ****
  • Posts: 329
    • Your online Help in Biology and chemistry
Reply #3 on: Jul 27, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

Did you know?

The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

DNA Is a Double Helix DNA Is a Double Helix
How to find the antiderivative of double-angle trigonometric functions, sin(2x), cos(2x), etc. How to find the antiderivative of double-angle trigonometric functions, sin(2x), cos(2x), etc.
Telescope Telescope
In a double-slit experiment, the slit separation is 1.75 mm, and two coherent wavelengths of ... In a double-slit experiment, the slit separation is 1.75 mm, and two coherent wavelengths of ...
Einstein telescope Einstein telescope
Newton Telescope Newton Telescope
Video: Peptide Bond Formation Animation

For a complete list of videos, visit our video library