All Questions
19
questions
5
votes
2
answers
2k
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Possible Safe Areas In a Solar Flare
Which part of the earth would be the safest in case of the major solar flare?
Will it be near equator or something like that?
- 53
25
votes
2
answers
4k
views
How fast is the Earth-Sun distance changing
This is inspired by Evidence that the Solar System is expanding like the Universe?, which referenced an article by G. A. Krasinsky and V. A. Brumberg, "Secular Increase of Astronomical Unit from ...
user10851
5
votes
2
answers
7k
views
Why does the Sun turn red near sunset?
At daytime the Sun's light is yellowish if not near white. Why when the Sun starts to go down that it's light turn more red. I don't think the earth's rotation is so rapid to cause a red shift.
Why ...
- 347
43
votes
5
answers
31k
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Why is a new moon not the same as a solar eclipse?
Forgive the elementary nature of this question:
Because a new moon occurs when the moon is positioned between the earth and sun, doesn't this also mean that somewhere on the Earth, a solar eclipse (...
- 1,335
28
votes
2
answers
10k
views
How long until we fall into the Sun?
As a planet moves through the solar system, a bow shock is formed as the solar wind is decelerated by the magnetic field of the planet. Presumably the creation of this shock wave would cause drag on ...
- 16.6k
59
votes
8
answers
13k
views
Is it possible to send all nuclear waste on Earth to the Sun?
If we neglect the danger of unsuccessful lift-off of the rocket and the cost, would it be physically possible to send all nuclear waste on Earth to the Sun?
Will there be an obstacle that prevents ...
- 679
14
votes
2
answers
3k
views
Why is there a temperature gradient on Earth?
I was thinking about why the poles are colder and I came out with three possible explanations.
1. The atmosphere blocks light beams coming to poles
The Sun is seen only slightly over the horizon at ...
- 776
6
votes
1
answer
5k
views
Finding radius of Earth through observation of Sun's motion
The question I'm about to pose is from a physics book I had recently bought. Since I am very interested in physics I am quite keen in understanding how this question can be solved. Before I present ...
- 383
6
votes
3
answers
585
views
How would normal matter behave under conditions found in the core of the sun?
Considering how low the power density is at the sun's core, I seem not to be able to expect what would happen to matter in case it was thrown inside the sun's core.
For example, let's assume an Earth-...
- 3,916
6
votes
4
answers
3k
views
Can human push Earth away from the Sun?
It's said the earth is approaching the sun. Can we push it away little by little?
Although we can emit rocket towards the sun, but it's too expensive to make a rocket:
So I think maybe we can ...
- 255
3
votes
3
answers
6k
views
How can we see the moon while it's between the Earth and the Sun? [duplicate]
I know this sounds like (and probably is) a stupid question, but I can't figure it out.
As far as I know, the crescent shape of the moon is when the moon is on the sunny side of the Earth, but that ...
- 141
3
votes
4
answers
510
views
Should the centripetal force of Earth's orbit around the Sun affect a pendulum on Earth?
Lets use approximate earth angular velocity around the sun with $\omega\approx2*10^{-7}\frac{r}{s}$ and earth translation orbit radius with $r\approx1.5*10^{11}m$ we can approximate centripetal ...
- 33
40
votes
3
answers
10k
views
Why wouldn't the part of the Earth facing the Sun a half year before be facing away from it now at noon?
The Earth takes 24 hours to spin around its own axis and 365 days to spin around the Sun. So in approximately half a year the Earth will have spun around its axis 182.5 times.
Now take a look at the ...
- 555
19
votes
3
answers
5k
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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
16
votes
2
answers
5k
views
Is the length of the day increasing?
In Frontiers of Astronomy, Fred Hoyle advanced an idea from E.E.R.Holmberg that although the Earth's day was originally much shorter than it is now, and has lengthened owing to tidal friction, that ...
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