Is the sun getting hotter??

Question

I just walked outside and the sun burned my face it was like a oven maybe I'm turning into a vampire I don't know

Answer 1

Yep by about 10 degrees every billion years. In 4 billion years the Sun will become a red giant being 500 times hotter than it is today.

Answer 2

Yes, the Sun is gradually getting hotter.  It's part of normal star evolution.  Astronomers estimate that Sun's energy output is about 40% higher now than what it was when the planets (including Earth) were formed.  Earth atmosphere evolved over time to have a some fabulous self-regulatory mechanisms that have kept the temperature on Earth's surface more or less constant in spite of this increase in Solar energy output.  The process is too slow to be perceptible over the span of a human life (or even our entire civilization), but it will continue, and eventually the Sun will grow so hot that it will burn all life on Earth surface.  But don't worry, we still have another 5 billion years before this happens.

Answer 3

The sun is getting hotter - but that's not really why you feel it.

The sun is getting hotter, but that has to do with the nuclear reactions and it is a slow and gradual process.

In the core of the sun, it makes energy by hydrogen fusion.

4H atoms make 1 He which leads to less particles in the core, so the pressure drops. The reason the sun doesn't just collpase under gravity is that the gas has pressure which counteracts gravity. If the pressure drops, the core contracts.

This converts potential energy to kinetic energy, so

the core gets hotter and denser. The rate of nuclear fusion is temperature dependent. A hot core means that more H atoms are fused to make He every second - to the sun gets hotter and brighter (and in fact bigger).

As core shrinks, outer layers expand.

Hotter core heats envelope, increasing its pressure and causing it to expand. Radius increases

The sun has increased in temperatre and radius by only 6% in the last 5 billion years

All that said - on a daily or even annual basis, this is not what is going to cause you to get burned. Getting burned is about the amount of UV you are getting - and global warming can;t increase that - it does, however, increase temperatures. Add to that, that global climate changes does more than increase temperatures, it can increase humidity - which makes the air feel hotter.

Answer 4

actually: yes, very slowly.

In 2 billion years the habitable zone of the solar system will move outside Earths orbit, possibly to mars.

PS: The Red Giant phase of Sun will be much cooler with 2600°C surface temperature (thats causing the red color of the star), only half as hot as it is today.

Answer 5

Maybe it's global warming...

Answer 6

no it's not getting hotter.

Answer 7

Not that you could possibly notice.  Your are not turning into a vampire.  Trust me on this one. Over the eons it is brightening and in about a billion years, all surface life on Earth will become extinct.   In 2BY the oceans will have evaporated and Earth will become like venus, forever dead and uninhabitable.  Actually it is possible to avoid this fate with some creative engineering involving the use of a largish asteroid, but engineering on this scale would require a civilization that could last for millions of years.  I don't see that happening.

Answer 8

The sun is not getting hotter, but the ozone layer is thinning making it seem that way

Answer 9

Gee, George... I dunno... lemme go stick a thermometer up its butt and I'll get back to you!  As for the vampire bit... go look in a mirror.  If nobody is looking back at you, then please go get your medication adjusted!!!