21 votes

What is this Sun and moon photographic anomaly?

The apparent anomaly, known as the Lunar Terminator or Moon Tilt Illusion, is indeed a matter of perspective. A brief explanation can be found here: http://chrisjones.id.au/MoonIllusion/ The essence: ...
Esquared's user avatar
  • 211
8 votes

What is this Sun and moon photographic anomaly?

Here my wife holds a globe with the moon in view. I carefully processed in a bit-mode to find the curve of light on the globe and drew perpendicular lines. Plainly we can see that the moon-lite side ...
Eric Reiter's user avatar
8 votes

Which Earth minerals would Moon colonists miss the most?

The composition of Moon rocks is pretty much the same as that of Earth. However, none of the processes that concentrate specific minerals in one location (i.e. into a mineral deposit useful for mining)...
Camilo Rada's user avatar
  • 17.7k
6 votes

Which Earth minerals would Moon colonists miss the most?

It is unlikely anything other than salt would be derived from sea water. The largest deposit of gold is dissolved within the worlds oceans - in terms of tonnes of metal. The problem with extracting ...
Fred's user avatar
  • 24.7k
5 votes
Accepted

What would be the effect of a geostationary moon?

First off, the geostationary Moon would have to be 115 times less massive as the actual one to match the gravitational pull. With that, one effect would be that the tidal pull would be stronger, but ...
Oscar Lanzi's user avatar
  • 3,831
5 votes

Why are there craters on the moon?

I'd like to expand on jamesqf's answer. But first, lit side of the moon and the dark There are no "lit" and "dark" sides of the moon. It rotates, and whatever is dark now will be lit in two weeks ...
Gimelist's user avatar
  • 23.1k
4 votes

Why are there craters on the moon?

There are craters on the Earth, Arizona's Meteor Crater being perhaps the best-known example. The reason that there aren't a lot more (obvious) ones is that the Earth has lots of dynamic processes, ...
jamesqf's user avatar
  • 1,758
4 votes

What is this Sun and moon photographic anomaly?

You can see this effect on the powerline above the railroad tracks in the picture you posted too, it doesn't look straight, even though it likely was in reality! The straight line between the sun and ...
Erik's user avatar
  • 1,999
3 votes

What is this Sun and moon photographic anomaly?

When looking at the sky, spherical coordinates are used as a convenience. We turn our head and body in azimuth and altitude to compare the position of objects. In this regards, the sky looks like a ...
JohnHoltz's user avatar
  • 262
3 votes

Which Earth minerals would Moon colonists miss the most?

Which Earth minerals would Moon colonists miss the most? tl;dr All of them. As mentioned in the other answers here, it's about economics. Extracting an element from a mineral requires energy, ...
Gimelist's user avatar
  • 23.1k
3 votes
Accepted

Which Earth minerals would Moon colonists miss the most?

Feels like a space-ex question and I think a fair bit is likely to be missed in my post, but it's a fun question, so: The biggest problem with the Moon is no atmosphere. Other problems are no ...
userLTK's user avatar
  • 5,857
2 votes

Which Earth minerals would Moon colonists miss the most?

biologically produced ones like coal and other petrochemicals. Marble, limestone, Diatomaceous earth, and other such minerals are candidates as well. Manganese oxides may be a good candidate the ...
John's user avatar
  • 6,891
2 votes

Why are there craters on the moon?

I think the question arises in part from the misconception that on the near side of the moon (the "lit" side as it was referred to) the Earth fills much of the sky and blocks most incoming impactors. (...
user25972's user avatar
  • 146
2 votes

Have we mined more on earth than 1% mass of moon? Because doing that to moon could potentially effect its gravitational pull

The mass of the Moon is 0.07346 × 1024 kg (or 7.346 × 1022 kg). One percent of that is 7.346 × 1020 kg, or 7.346 × 1019 tonnes. If you consider iron ore alone, global production in 2023 was 2.544 ...
Fred's user avatar
  • 24.7k
1 vote

Does the Sun and Moon basically appear to "move on the sky" identically regardless of location and date?

Like Fred said, this probably belongs on Astronomy SE, but I'll give my best answer anyways. No, the sun and moon do not take the same path each day. The key to understanding this is knowing that the ...
BarocliniCplusplus's user avatar
1 vote

What is this Sun and moon photographic anomaly?

Here is what you do. Look at the moon. See which way the sunlit face of the moon is pointing, not in a picture but in a real-life view of the moon. Using your own perception, trace a line ...
Bruzote's user avatar
  • 199
1 vote

Musing on Earth's gravity

For (a) through (c), consider the differences between the geoid and the reference ellipsoid, in addition to the barycentre. For (d): A slightly higher perigean spring tide than usual, meaning in some ...
Johan Wilmot's user avatar

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