Would Earth experience warming if we had no sun?

Question

If the sun was 25% hotter, would we all die?

If the sun was 1% hotter would it raise earths temperature 1 degree?

Answer 1

No, the Earth would be fozen if we had no Sun.

Yes, if the Sun was 25% hotter we would all die.

No, if the Sun were 1% hotter it would not raise the Earth's temperature 1 degree.

Answer 2

As everyone seems to agree, earth would freeze without the sun.

However, the answers to the other two questions aren't so easy.

First of all, it isn't the temperature of the sun itself that really matters. It's the light that turns into radiant heat. Have you ever been in a small airplane? Gets cold up there, right? So if it's the heat of the sun, why isn't it even hotter closer to it?

So what would happen if the sun got hotter? Depends on whether or not it emitted more light. Even then, it depends on the full mechanism of the greenhouse effect, which might well be self-correcting and the gases would adjust to allow more of the radiant heat to escape into space.

Considering that the planet has supported life since back before the dinosaurs, there's good reason to believe that the mechanism IS self-correcting over time.

If the global warming alarmists who think they know everything have their way, we won't be looking for how that works.

Answer 3

The Sun is needed for warming, so no Sun would mean no warming.

A 25% hotter Sun would make the planet so hot that the oceans would boil away and all life would be destroyed.

Not sure how much warmer a 1% hotter Sun would make Earth. I guess 5 or 10 degrees maybe, but don't quote me on that.

Answer 4

If we had no sun we would be doomed, but there would be life around volcanic vents. If the sun increased by 1% (or 13 watts/meter^2 ), the earth would warm up several degrees farenheit, and the climate would be even warmer than the age of the dinosaurs. If the sun warmed up by 25% (341 watts/meter^2) the temperature on earth would be warmer than the boiling point of water and the earth would look similar to Venus.

Answer 5

The only warmth on earth without a sun would have to come from the molten core of the planet. When this cooled it would be a frozen ball in space.

If there were no sun, all surface life would die. Animals and other organisms that live off of the heat and minerals of thermal vents in the ocean could probably continue to live until the earth's core cooled down. But anything dependant on light would be dead.

If the sun were to increase in brightness by 11% life on earth would end. The possibility of bateria or other single-celled life that could withstand intense heat might last a little while longer but life as we know it would be long gone. Severe measures would have to be taken for humans to survive that kind of increase.( living underground in bio-domes or some other inventive solution)

Answer 6

Love to hear all the experts chiming in. Mr. Jello one of my favorites.

Obviously the sun being 25% hotter would not be very good for us... nor would the sun vanishing away (how would that work anyway?)

But Mr. Jello's expert opinion is about a 1% rise in carbon dioxide, and he's sure he knows the answer: no problemo.

First off, it isn't a 1% rise we are seeing in CO2... it comes out to nearly fifteen percent in the last century...

And 15% more of something in a system makes it a completely different system.

He would be advised to study closely a basic adage of physics: quantitative change leads to qualitative change.

It seems a very applicable principle here.

But Mr. Jello shouldn't worry. His side is winning the debate by keeping the public confused. There is no man caused climactic change is easier for people to accept than, I guess, what they can actually see...

Hell, it usually rains after fireworks, and that's a miniscule amount of extra carbon cordite in the air...

Answer 7

Imagine people claiming that if the Suns temp goes up 1 deg we would all be just fine, we wouldn't notice any difference, but if CO2 increases a scant 0.001%, well we're all doomed.

That shown dedication to the myth of man made warming!

Answer 8

Well, if there was no sun not only would the earth freeze but it would no longer stay in orbit. We would hurtle through space until most likely we collided with another star and exploded.

Answer 9

No.

If there was no sun there would be no us. We need to sun to live because plants need to sun to grow and make food so if there was no sun they would be no plants, no oxygen being made and defiantly no humans or other animals, insects, fish and anything else that needs oxygen to breathe.

Answer 10

we would all get real cold in a week with no sun