When will the world end?
The Earth as we know it will come to an end some time in the next 5 billion years.
Massive volcanoes or weapons of mass destruction have the potential to drastically alter the planet's climate and render some areas uninhabitable.
The likelihood that Earth will be struck by a large enough asteroid or comet to trigger an Extinction Level Event increases with time; hopefully, by then, we will have the technology to deflect the incoming object.
The Milky Way Galaxy and the Andromeda Galaxy will collide in approximately 4 billion years. Should another star approach the solar system, it could cause disruptions to Earth's orbit, pushing it outside the habitable zone, or cause something to collide with Earth.
Eventually, the Sun will reach its red giant stage in roughly 5 billion years. At that point, Earth will be either very close to the Sun or even inside it, with the oceans boiling off and the surface turning molten. The Sun will swell up to roughly the size of the Earth's orbit.
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The end of the world is unpredictable and uncertain, depending on a number of variables including cosmic events, human behavior, and natural events. No precise date or time frame for the end of the world is known.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
- How do you calculate the diameter of the sun?
- How long does it take for energy produced in the core of the Sun to reach the earth?
- What is keeping the Earth's degree of tilt in its orbit around the Sun and why doesn't the Earth wobble? When was the last time the Earth's degree of tilt changed?
- Any information on the interior of Phobos?
- Why do the stars appear to rotate around Polaris?

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