All Questions
7
questions
-1
votes
1
answer
81
views
How fast do I have to fly vertically up to pause sunset?
I'm standing on the famous Laguna Beach in southern Los Angeles to watch the sunset on December 18th (33.541679°N 117.777214°W, 0m elevation, 16:44 PST). Now, from my perspective at the shore, the sun'...
16
votes
4
answers
4k
views
Does dusk really remain for a shorter period of time at the equator?
It is said that the dusk remains for shorter time at equator than the poles. Because, the equator rotates faster than poles. But it is also true that time is the same in every latitude, and if it's ...
- 1,070
1
vote
2
answers
444
views
What is the minimum size of an object to cast a shadow on the entire Earth?
When I fly up(don't ask me how), I see how my Sun's shadow on Earth is getting bigger but dimmer as the Sun's light is reflected from other objects.
As I flew higher and higher in the direction of the ...
- 2,127
0
votes
1
answer
110
views
Was Eratosthenes justified in his belief the earth was round? [closed]
Because I see two flaws with it, firstly he assumes the distance of the sun won't affect the angle at which light hits the pole. If the sun were far closer and far smaller, there would be a change in ...
- 361
2
votes
1
answer
2k
views
How is the constant "284" derived within the Solar Declination Angle equation?
How is the constant "284" derived within the Solar Declination Angle equation?
The earth's axis results in a day-by-day variation of the angle
between the earth-sun line and the earth's ...
- 457
41
votes
7
answers
9k
views
Why does the full Moon appear?
I know that the full Moon appears when Sun, Moon and Earth are in a straight line, but if we consider that they are in straight line, why is the Moon illuminated?
I mean to say that Earth should ...
- 592
19
votes
3
answers
5k
views
How can a full moon be seen south of an observer's location?
I know this seems like a simple question, but I'm trying to debate with a flat earth theorist. I asked him to explain why can the ISS visibly be seen orbiting the Earth with the naked eye, and he put ...
- 215