Earth Science Stack Exchange
Earth Science Stack Exchange

Questions tagged [earth-observation]

Observations recorded on earth.

78 questions
12
votes
3 answers

Comparing the Earth with a basketball?

(Please excuse my English) The picture above is an image of the Earth without water. We know that the picture above is a very exaggerated one. If the Earth were to shrink to the size of the picture above, it would look like a very smooth and round…
pdh0710
  • 251
  • 2
  • 5
10
votes
7 answers

How can one know the correct direction on a cloudy day?

On a sunny day, one can find the direction (NESW) by observing the Sun's movement across the sky. In the northern hemisphere, during a clear night, one can find the direction by looking at Polaris or other stars and constellations. However, how can…
YYY
  • 201
  • 5
8
votes
3 answers

Can I see curvature of the Earth on a picture

I've been piloting a drone yesterday and made a video hovering at around 100m, the visibility was very good. I've shown the video to a friend of mine and we were arguing whether it's the curvature of the Earth visible at horizon, or is it just…
mmm
  • 83
  • 1
  • 3
3
votes
0 answers

WMM and IGRF model?

I am studying about World Magnetic Model (WMM) and International Geomagnetic Reference Field (IGRF) model provides the seven parameters about the earth magnetic field. These models have to be deployed on the nano satellite now i am confused how…
TIWARI
  • 131
  • 2
3
votes
3 answers

At what latitudes does daytime last exactly 24 hours once in the year?

I assume at the Solstice - a definite latitude would have exactly 24 hours of daylight. What latitudes (North and South) are these - they might vary a little with longitude?
user2617804
  • 133
  • 4
3
votes
0 answers

Earth's magnetic and electric field in Hilly Areas

Can you please guide me as to what is the intensity of earth's magnetic and electric fields in different regions of earth. Also, specifically in case of hilly or mountainious regions.
Ruchi Gadiya
  • 31
  • 1
1
vote
0 answers

How high must one be to see the curvatue of the earth with the naked eye?

I have read the various answers to this question provided by people with a higher intellect than me, however I am still confused. Even from the ISS your view is to the horizon some 1,435 miles in all directions. Is the view not the same as being on…
steve wilkes
  • 11
  • 1
1
vote
3 answers

Effects of CERN on earth's magnetic field?

CERN is a scientific site developed to create anti matter. Does this have any negative impact on the environment?
Jeffrey Boettger
  • 499
  • 4
  • 15
1
vote
0 answers

How much curvature of the Earth can be seen at altitude?

Is there an equation that produces the amount of curvature of the Earth one should see at the altitude of x (whatever x may be)? I imagine it would be a complicated equation, and not as simple as people who believe the earth is flat say. (of course…
Christian Sirolli
  • 185
  • 8
0
votes
1 answer

What is the ultimate limit of horizontal visibility in Earth's atmosphere?

When meteorological conditions are favorable for generally unlimited visibility, does that mean the atmosphere is sufficiently clear under these conditions that horizontal visibility is truly unlimited? Or is there a limit to the distance we can…
KeShAw
  • 1
  • 2