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

Author Question: How can we tell that some stars are relatively close to us in the sky? a. Some stars are ... (Read 32 times)

Themember4

  • Hero Member
  • *****
  • Posts: 538
on: Jul 27, 2018
How can we tell that some stars are relatively close to us in the sky?
 
  a. Some stars are occasionally eclipsed by the Moon, so they must be nearby.
  b. Some stars vary in brightness caused by sunspots we can see because they are so close.
  c. Some stars appear to be extremely bright and must therefore be very close to us.
  d. Some stars appear to move periodically back and forth against the background stars because of Earth's movement around the Sun.

Question 2

A telescope whose primary is a lens and contains no mirrors is a(n) _______ telescope.
 
  a. refracting
  b. reflecting
  c. deflecting
  d. compound
  e. retracting


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

GCabra

  • Sr. Member
  • ****
  • Posts: 331
Reply #1 on: Jul 27, 2018
Answer to Question 1

d

Answer to Question 2

a


Themember4

  • Member
  • Posts: 538
Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

lkanara2

  • Member
  • Posts: 329
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

Aerial and close-up views of a large biodiversity experiment in Cedar Creek, Minnesota. Each of the Aerial and close-up views of a large biodiversity experiment in Cedar Creek, Minnesota. Each of the
Much of the dark space between stars, as seen in the sky of the image above, is due to the human eye Much of the dark space between stars, as seen in the sky of the image above, is due to the human eye
Iberian lynx in close-up Iberian lynx in close-up
Close-ups of Jupiter’s Atmosphere Close-ups of Jupiter’s Atmosphere
Plotting the Ages of Stars Plotting the Ages of Stars
Close-up of a newly created enzyme degrading PET plastic Close-up of a newly created enzyme degrading PET plastic
Video: Genetic distance between human groups

For a complete list of videos, visit our video library