A Year Of Sunrises

[jarrettpeter37]

I want this video on my C3320 phone.

[tvsinesperanto]

That should have read "the angle at which the sunLIGHT hits the earths surface", not the sun itself of course. It would be summer x 10,000 everywhere on earth if that happened ;-)

[wolfy9005]

@tvsinesperanto There would be no earth if the sun hit us :) 2 million degrees would vaporise the rock itself and we'd be swallowed by the sun, never to be seen again.

[tvsinesperanto]

@wolfy9005 Actually, the Sun's only about 5500 degrees C (although the corona is significantly hotter). SiO2 (the main component of rock) boils at only 2500-ish degrees though so, yeah, it would probably vaporise the rock. Not immediately, but pretty damn fast.

You're also right about it swallowing us up. "GULP..BURRRP. What's for dessert? Hmm, Mars looks tasty."

When Sol becomes a red giant in a few million yrs we'll see it first hand. If we last that long. Doubtful the way we're going IMHO.

[mastermanio2]

@tvsinesperanto few billion, but nonetheless correct

[tvsinesperanto]

@mastermanio2 A few *billion* years, yes. Slip of the keyboard. Thanks for the correction.

[wolfy9005]

@tvsinesperanto The surface, yes. But the corona is around the 2 million celcius mark, and this is what i meant would be doing to vaporising :)

[tvsinesperanto]

@andres6868 Yes, the seasons are caused by the angle at which the sun hits the earth's surface & not the distance the earth is from the sun as is widely believed (although that would have a very small effect as well)

[mastermanio2]

@tvsinesperanto it is actually caused by both the distance and the angle. Angle plays a far greater role, but the Earth's orbit is far from perfect :)

[tvsinesperanto]

Wow, that's amazing. I love time lapse, it's always an eye opener.

[Paiste402]

this is amazing dude, top notch video!!

[andres6868]

So that tilt explain seasons, right?

[vitto]

Earth orbit isn't perfect. There's a time where we are at the closest point to the Sun, also the planet wobbles.

[mastermanio2]

@vitto Is the wobble now believed to cause an effect on the seasons?

I don't recall ever hearing if they eventually decided that

[vitto]

not..it's involved but it doesn't change earth weather like the sun.

[vitto]

Earth orbit isn't perfect. There's a time where we are at the closest point to the Sun, also the planet wobbles.

[BodyArtist75]

Daylight saving times?

[MultiSteveB]

Take *that*, geocentrism!

And it was great seeing you at DragonCon, Dr. Plait.

[MrEpicTruth]

wtf was this at 0:17?

[NStenO]

"Local time" doesn't really help when talking about the whole Earth.

[TomConger]

I think I would rather see it with the terminator stationary, and the Earth tilting on its axis. Still a cool video!

[ihmen]

sun goes up, sun goes down. never a miss communication. YOU cant explain that, and if you say gravity then ill just say how did gravity get there? obviously the deity im thinking of put it there. what, you think the deity you're thinking of put it there? IDIOT!

[nightpwner]

WOAH WOAH WOAH! First of all... since when was the Earth round?!

[laserfloyd]

FAKE! There's no Moon!

Seriously a very cool video illustrating why we have seasons in the first place. Sharing is imminent. :)

[BeautifiedDiversity]

@laserfloyd It's not fake. If the photos were taken at 6AM each day, then the moon is going to always be where it is at 6AM. Who knows, it could be behind the satellite.

[greywolf1958]

@BeautifiedDiversity The Moon would only remain in the same place relative to Earth if it was in geostationary orbit, which it's not. Hence why if you watch it each evening at exactly the same time, it rises in a slightly more easterly position each day. The satellite taking these pics IS in geostationary orbit at about 22,000 miles away (I stand to be corrected on the distance) and the Moon is nearly 250,000 miles from Earth, which is another good reason why it doesn't appear in shot :o)

[BeautifiedDiversity]

@laserfloyd Or he could have taken the moon out for these photos, for all we know. XD

[LadyMyara]

i believe this explains 4 seasons! ^^

[bobster451]

The Sahara seems kind of dry... You think?

[AnotherPostcard]

@bobster451 Can't explain that!

[bobster451]

@AnotherPostcard ;-)

[tiznogodz]

Science can be art - this is just beautiful!

[superdau]

And now remember that it's actually not the sun moving up and down but the Earth wobbling. I feel a little dizzy.

Actually a version of the video where the day-night-line is fixed but the Earth is tilting would also be nice.

[Torq11]

@superdau It's not the earth wabbling, it's the fact that the earth is tilted, and as it orbits the sun in a year, it is either tilted away from or towards the sun. The earth does wobble, but one full circle of a "Wobble" takes something like 24,000 years (not sure on that number).

The earths tilt stays roughly the same, it's where the earth is located in relation to the sun that cause the sunrises we see in the video

[sonicase]

never thought about the geosyncronus sattelites also tilting with the earth but i guess they do have to do that

[christine12753]

WOW! I love this! SO TOTALLY COOL!

[Crowfighting]

Very nice! Pity the video compression artifacts are so noticeable though (the jumping grey line along the terminator, mostly). Lovely to see nonetheless.

[504Culture]

That was great! Well done!

OneLOVE

[BedroomBassist]

Wow. I've never seen the "wobble" of Earth on its axis so obviously! Awesome.

[CanadienAtheist]

That was bloody awesome.

[docatomics]

...nice equinox/axis demonstration

~even I could grasp this one

=in pictures form

+have a happy Spring/Fall Equinox ya-all :)

[TheBetterGame]

Sun comes up, sun goes down. You can't explain that!

[T0B0KKE]

@TheBetterGame "How did it get there? Hmm? How the sun get there? How the moon get there?"

[JUSTACHIPN]

@T0B0KKE  "BOOM"

[MNico1992]

@T0B0KKE science

[undercop5567]

@TheBetterGame

Aliens

[lui3090]

cool



[andyroo24601]

Is that.. sand moving about?

Beautiful, thanks for the upload :)

[therealklanni]

@andyroo24601 I'm not sure what you're referring to, but maybe you're seeing the clouds.

[therealklanni]

Fan-fucking-tastic!

[mortensjoegren]

Cool

[xerox123321]

awesome.